This is the only hacker-focused startup that I've seen from YCombinator that I really understand the market for. I consider it most likely to succeed among the hacker-focused startups. It exists in a growing market niche (rails developers) and solves a crucial problem (easy rails deployment).
Wouldn't hackers be miore comfortable with a local, highly customized development set-up; scp, ssh , etc. + assorted tools for deployment; and want to use their own revision control system?
