Ask HN: Recommendations for outsourcing UX/design?

I'm looking for advice and recommendations for outsourcing the design of a webapp. I can do the coding but, unfortunately, don't have the design abilities to make pretty web 2.0-looking screens. The money is there... just not the design skills.

Any information about experiences with specific companies, common pitfalls, or other tips are greatly appreciated. Feel free to plug yourself if interested.