Chrome as a compiler is 100% compatible with XNA. It you don't mind waiting for full XNA support in Visual 2005 ( NOT Express ), then you can start writing XNA code yesterday. The only issue is getting it only the XBox 360, but even that has a small work around until the support is built into VS2005.

I also think it would be nice to port this demo to Chrome, but I don't have the time right now to start another port project.

My system specs are the ones I posted when I bought the new motherboard, CPU and graphics card. The main thing is having Shader 2.0 or 3.0 support for most XNA stuff.