I'm thinking if we go ahead with the idea, it will look something like this: we'll make content-categorized entries in this comm (probably one for fic, one for art, and one for other things like podfic and recs lists). People willing to buy accounts can post comments describing the content they're looking for, and people seeking accounts can post comments with the content they're offering. This will be participate-at-your-own-risk; obviously the community can't be responsible for people flaking out.
All suggestions and discussion is welcomed!
EDIT: Okay, Aja linked this post, so I guess we'll just do this here. Comment if you want an account or if you'd be willing to buy one for someone, and include what you're offering or requesting.