Has anyone played this before? It's a rather new game that uses Ken Silverman's Voxlap engine to create a TF2/Minecraft hybrid. It's ugly but it'll run on anything, and in terms of connection speeds, you can expect good gameplay even at a ping of 200.

Anyway you can check out its official website here.

Oh yeah, and if you have trouble connecting to other servers, check out this thread on its official forums.

As a side note this game really reminds me of Cannon Fodder, what with it being about little blue/green soldiers and all.