Same situation as the rest of this thread - I just get cpu usage and a white screen, in Chrome stable/beta/dev. OSX on a MBP, only thing I can think that might be shared with others having problems is my GPU: GeForce 8600M GT. I haven't heard of problems with this card before, but OSX + GPU ≠ consistent results, at times.
Though interestingly, the behavior in all three Chromes is wildly different: Dev runs 60% CPU use in the rendering process, Beta sometimes uses nothing, sometimes 60%, and Stable uses the same 60% + 120% on "google chrome helper". The alert test works (shows a canvas element) in both Dev and Beta, Stable shows me a "page unresponsive" after a couple seconds and never alerts anything.
Other GL tests work just fine in all 3. I'll be happy to test other things if you can come up with them :)