If this was asynchronous multi-player capable, I'd be all over this. Sadly, no one seems interested in building anything like that. Granted, it's not too hard to set up oneself, but the match-making, account-creating, and similar services that one needs would really benefit from a common framework.
I'm writing a game that is asynchronous, multi-player (UDP, authoritative server, thin client). The plan is for each game instance to support 100-250 simultaneous players in real-time (5-10 UDP packets per second per player).
I wasn't able to find any existing server SDK's that were a good fit so I have been writing all my services from scratch. Initially, I was using LuaJit, but ran into so many incompatibility / cross-library related headaches that I switched to Google's Go language and it has increased my productivity substantially.