您使用什么来进行客户端与GWT的服务器通信？

GWT RPC is proprietary but looks solid, supported with patterns by Google, and is mentioned by every book and tutorial I've seen. Is it really the choice for GWT client/server communcation? Do you use it and if not why and what you chose? I assume that I have generic server application code that can accommodate for RPC, EJBs, web services/SOAP, REST, etc.GWT RPC is proprietary but looks solid, support