Well, I'm not sure if it's a good thing or not but I ordered the make controller based only on speed (controller's speed, not that I am on speed, heh).
I'm not sure I understood completely what [westfw] said, but if the arm/crossworks-makeController chain is buggy, that would suck. BADLY. Anyway, if it is buggy or I find that it's too cumbersome or buggy to write/upload C code for it, than I'll just keep it for computer controlled stuff (I'd rather it didn't come to that).
As for my project, it's pretty simple. I have an RC car that I'm using as a base, with an Electronic Speed Control (ESC) for the motors, powered by a battery. The make controller + gyro will tell the ESC which way to turn the wheels to keep it balanced. From then on, controlling it's direction by remote control should be a piece of cake.
Of course, all this is the simplified version, there will also be some speed trimmings and corrections but I'm not gonna go into that here. I still have to decide on the gyro though, I'm a little confused on which one to pick (maybe somebody can give some advice here).
So that's my project. What's a block diagram ? :