I'd post on The Forge or Story-Games, but since I'm talking about a traditional game (i.e., not story game), and I'm not ready to take on designing a game, I'm not sure either of those are appropriate.
I'm really itching for something modern/futuristic with lots of gear. To give you an idea of what I'm talking about: I was, several years ago, in a d20 Modern/Urban Arcana game in which I played a half-fiend female lead singer of a prog-metal band who'd been recruited into some black ops or mercenary outfit for infiltration/investigation/espionage kind of stuff. She had a mix of handguns, a couple flavors of a smoke grenades, a Ducati, ....
I'd like something kind of tactical, rather than pure story game, but not as crunchy as 4E. GM-less, with some co-authorship. Maybe Universalis-style controls on how adversaries and challenges are brought into the game?
I know some of you have broader experience than I do with what's out there. Does this game already exist?