Just got back from GDC. I'll probably be back again tomorrow or later tonight. Took lots of cell phone pictures, but I will bring my camera on the next trip. Sony has a fairly large booth set up demoing the PS3. They have VF5, Motorstorm, and a few others on hand. There's a UE3/UT demo -- looks good, but I was not totally blown away by the framerate at this point. They have some development demo machines set up running VS2005 and some fliers from IBM and Sony on CELL development resources (including the cell sdk and links to cellperformance.com).
I tried to grab all the free stuff that wasn't nailed down, though admittedly I didn't come away with much. I think our booth had some of the best stuff, actually. The best (only?) booth-babes are at the S3 booth, so be sure to check that out if you have a chance.