Here are links to the stories written so far!
--Clark/Bruce/Lois threeway.
--Knowing that Batman pretends to be the dizzy!socialite Bruce turns on Superman immensely.
--Outdoor sex - specifically the hood of the Kent farm's pickup truck.
--Superhero/Civilian public sex (ie, Clark Kent/Batman or Bruce Wayne/Superman): Part 1 and Part 2
--Dick watches as Bruce and Clark have sex
--Quicke on the sofa in Bruce's office. (Wayne Tower) Luthor walks in and is oblivious to the situations and insists on talking about some joint venture (or something): Part 1 and Part 2
--Quicke on the sofa in Bruce's office. (Wayne Tower) Luthor walks in and is oblivious to the situations and insists on talking about some joint venture (or something)
--Clark Kent (not Superman) talking dirty.
--The Batmobile has definitely seen cleaner days, so Batman goes for it. Superman is inclined to help.
--Smutty, but hilarious Batman mpreg.
-------
--Clark watches Bruce masturbate Part One and Part Two
--Clark watches Bruce masturbate
--Supes and Bats go to see just how many places on the Watchtower they can have sex before anybody finds out--Part One and Part Two
--2 x Bruce - Author's choice, if split into Batman and Wayne or one is from an AU or other reasons; Author's choice how many Clarks ;)
--Superman/Batman, post-battle victory/thank-god-we're-alive sex--Part One and Part Two
---
--Trinity porn! The Trinity returns to the Watchtower after a mission where they were unknowingly exposed to sexy pollen. A full JLU cafeteria may be able to see or hear the results of the sex pollen taking effect: Part One and Part Two
--Playboy Bruce Wayne inserts toy into Superman, then Superman returns the favor by fucking Bruce senseless while inserted: --Bruce finds Clark dressed in one of Batman's suits. Bonus points if Bruce ends up (or starts off) wearing Superman's suit: Part One, Part Two and Part Three. Also fits the prompt: One of them does a strip-tease for the other. Bonus points if they're doing it over video-conference.
--Bruce is dressed to the nines in his usual GQ fashion and has sex with Clark, who is completely naked: Part One and Part Two.
--Bruce finds Clark dressed in one of Batman's suits. Bonus points if Bruce ends up (or starts off) wearing Superman's suit. Also fits the prompt: Kryptonite! Author's choice - green K, red K, pink K or even that weird opaly one that makes Clark high.
--C/B shower sex.
--Superman is indeed super, 'coz he can make Batman cum without touching him.
--While on the run from some big bad guys, Clark and Bruce hide away in a confined space. Frottage ensues, as well as some surprising admissions of fantasies they've had of each other.
--Clark/Bruce, unconventional uses of elevators
------
--Bruce as a vampire, biting (a very willing) Clark during sex: Part One, Part Two, and Part Three
--2 x Bruce - Author's choice, if split into Batman and Wayne or one is from an AU or other reasons; Author's choice how many Clarks ;): Part One, Part Two, and Part Three.
--A humorously failed attempt at sex up against the wall.
--I don't care about the context, I just want Bruce as bottom, riding the hell out of Clark.
--Clark is undercover as an exotic dancer at a nightclub and Bruce watches him perform.
--"Alien scientist" Kal-El "abducts" Bruce Wayne for "experimental purposes.
-----
--Supergirl discovers Clark/Bruce, and Clark freaks a tiny bit. Preferably, Kara has no knowledge of Batman's identity.
--Rape fic. Superman can be mind-controlled, angered by something Batman did, or anything you like.
--Clark and Bruce sharing a warm bath or being in a hot tub.
--Amnesia. Don't care who, how, or to what extent.
--Superman/Batman (obviously), tentacles, Superman refuses to free them both with his superstrenght, Batman is pissed (at first)

Sex in the Daily Planet! Preferably in which Lois walks in on them. (Or joins in, if you want, I don't mind.)
Bruce and Clark's first meeting is in a gay bar. They neither know or recognize each other and spend a night together. Later on, they meet again as Clark Kent and Bruce Wayne and/or Superman and Batman and, of course, recognize each other.
Two Woirds: Accidental Stimultaion. Preferable during a meeting in the Watchtower
bondage? please?
Diana catches the boys going at it (probably in the Watchtower but can be someplace else). She doesn't let them know it but teases them with double entendres and knowing smiles.
Can Someone write fic to this: http://www.youtube.com/watch?v=avWYEEws6
Knowing that Batman pretends to be the dizzy!socialite Bruce turns on Superman immensely.
On an alien planet, Bruce and Clark pretend to be married.
Superman/Batman. Alien anal probe.
A longing (masturbating?) Bruce watches Clark and Lois have sex.
The Robin's attitude to finding out about Bruce/Clark. Bonus Points for Jealous Dick (reason your choice), Jason already being aware or Tim/Kon. Fic request if all three.
Clark/Bruce - sex in mid air.
Superman/Bruce Wayne, A photo op that gets kinky.
I'd like for a fic involving clark and bruce injuring eachother (with knives please), and even better if this happens after clark somehow finds out that bruce is a cutter and bruce shows deep trust by letting clark witness him cutting. I'd like it to be angsty... but obviously want them both to get off on the act. thanks!
Batman invents and experiments with devices to power up or help Superman.
Implied Clark / Bruce mpreg, kinda cracky. Tim, Dick and Kon (Chris and the remaining bat-kids optional) are shopping for baby supplies and clothes. XD
Take what you think is the worst cliché and try turning it into your hottest fic ever.
Bruce is munching away at a load of food in the manor's kitchen. Clark finds him like that but is able to put the food to beter use.
Jailbait!Bruce. Bruce somehow regresses in age to a teenager and presents a strong challenge for Clark to keep his libido in check. You can add memory loss for Bruce if you want.
Batman falls "victim" to a sex-crazed watchtower - but Superman has the last word.
Threesome with Tony Stark. Bruce as !bottom.
Foursome with Tony Stark and Steve Rodgers (nothing like a bit of swinging for keeping the magic alive)
Restraint and longing Bruce waiting for Clark's return.
Batman gets superpowers, doesn't go crazy and has a (too)friendly competition with the Man of Steel.
Possessive!Clark. Bruce is doing his Brucie routine, and due to some circumstance of your choice, Clark decides that he's had enough. PDA ensues.
Whorefic! Either Bruce or Clark is a callboy, can be for undercover/on the job or an AU.
Telephone Sex.
Bruce and Clark have to perform alien-bonding ceremony for some reason. The ceremony involves them having to express their deepest desires without being able to hide them.
!Stalker Clark. When Bruce breaks up with Clark for a perfectly logical, strategic, but flawed reason, Clark decides to closely monitor and annoy Bruce until Bruce gives up and sees that he is wrong.
Bruce is caught singing by Clark. Can be in any scenario you prefer (For example, Bruce is working undercover as a singer in a nightclub or is forced by a magical spell to sing).
Clark and Bruce sharing a warm bath or being in a hot tub.
Batman and Superman secretly give each other blow-jobs while on a conference call with the JLA.
Forceful clothes grabbing or pulling: ties, shirts, pant's waistbands, capes, any and all would do.
Superman using super speed to touch Bruce, while staying clear of Bruce's touch.