This is really interesting. Torque works now on PC, Mac, XBox(360), WII and can be programmed via Torque-Script / C++ and C# (TorqueX).
The TorqueX does all the effects via shader 2.0 since XBox360 and PC supports it and thus CPU is free for other tasks.
But Open-GL as alternative for PC and Mac is very good as well.

Garage Games must be busy people and they must have a very open concept if they can port their tools so quickly and often.

I checked a few games from Garage Games yesterday and some of them are really addictive.