Sharkyextreme has posted a very in-depth look at the ATI Radeon (both 32MB and 64MB versions). Lots of useful info on the card, despite all benchmarks being done on x86-architecture machines. Definitely gets nice and nitty gritty for the hardware junky in all of us. Take a look.
Almost funny, really, to think that soon perhaps the Mac gamer will actually have to sit down and choose which 3D accelerator to use. Almost boggles the mind!