我应该如何为基于回合制的多人iPhone桌面游戏构建我的数据库和API服务器？ （想想nodejs，mongo，沙发等）

I'm working on a turn based board game for iPhone and eventually Android. I'm using Appcelerator Titanium to develop it. My multiplayer design is similar to Words With Friends. Users take turns when ready, and then the opponent's game board is updated accordingly.I'm working on a turn based board game for iPho