I've been too busy at work recently to post anything here. However I have received a couple of XML-RPC.NET bug reports and they have prompted me to start on the 1.0 release. I'm setting up a build environment on my Shuttle pc which will use NAnt to build versions of the library for .NET, 1.0 and 1.1, and Mono (currently at 0.28).
The Mono compiler almost compiles the library now. Just one error which I have yet to investigate. Once I get it working with Mono on Windows I'll then move on to Linux.