My T30 has a Radeon 7500, and attempting to game on it is a cruel joke. Even when paired with a relatively fast (but battery swilling) 2.4 GHz Pentium 4 M, this computer will only score a 3500 in 3DMark 2001. Yes, that's a 3500 3DMark 2001, NOT 3DMark 2003! Some of the tests in 3DMark 2001 (like the pixel shader tests) will not run in 3DMark 2001, and MOST of the 3DMark 2003 tests won't run.
Benchmarks aside, I've found that most DirectX 7 level games will play OK at 1024x768 resolution. Games that use DirectX 9 features aren't even worth trying, however.