Sweet, looks way legit! Mine is actually going to be a remake of what I attempted on Blockland. I'll have to see if it all works out. I really recommend Unity 3d though, it's extremely powerful and flexible, able to run scripts written in C#, C++, JavaScript, Boo, etc. as well as models imported from any modeling program. You can test your game in the editor, and it has good physics from Nvidia.
Anyhow, I'm going to attempt making a MMORPG. Any help is welcome. (PM me)