Just wanted to pop in and tell everybody what I've been working on for the past while.
It's an arcadey tank combat game in lieu of Battletanx, but with online multiplayer. I'm using C# with IrrlichtLime for rendering, Lidgren for networking, and Jitter for physics. So far, I can drive a tank around and push around the other tanks between multiple clients, and believe me, I feel quite accomplished.
Stay tuned for more updates or possibly demos