Hi, nice list! I'm a member here and a graphic artist by trade, doing primarily work for games. http://fricod.blogspot.com
I do both licensing as well as work for hire setups and deferred payments (royalties with an upfront part, profit split). Deferred payments are only accepted when third party sales tracking software is used I can monitor.
I'm active on Elance (level 8) and Freelancer (level 10) as well, in case escrow is preferred.