I have begun coding on my new engine, entitled NebulaX.
Today I threw together a simple text rendering component and started working on a complete GUI library. Most stuff is directly ported from my old engine and altered to fit the pretty cool game component and content pipeline stuff in XNA.
I've also got myself a XBox 360 gamepad for my PC. Need that to test my input code.
A few days ago I found a cool open source project: Mono.XNA, witch is going to be an implementation of XNA using Mono and Tao.
So, all you "I-use-C++-instead-of-C#-since-I-want-platform-independence" people, stop whining and start using 21th century technology:)