easyXDM (http://easyxdm.net/) is also a good suggestion, it supports XDM using a number of techniques, and it also supports RPC! There's an article about how it works at http://msdn.microsoft.com/en-us/scriptjunkie/ff80... check it out!

This is old code that was deprecated a long time ago :) Please follow the samples at the official site :)
I'll follow up on email!