Since I have gotten my 32GB 3G touch I have been trying to find games with opengl 2.0 support and I am not having much luck. So far these are the only ones I have been able to verify....
Texting of the Bread - Not opengl 2.0 as far as I can tell but still has settings for nicer graphics on 3g +
The cave shooters obviously since they don't even support older devices.
The epic demo for the same reason.
Real Racing - difference is hardly noticeable.
Hero of Sparta 2 - I can't tell much difference but I haven't run them side by side to make sure.
Any other suggestions?