After my fairly disparaging posts about Chrome recently I was feeling bad for it, so I installed Chromium on my Linux Thinkpad again, but soon realised why I didn't use it: Chromium doesn't respect GTK's font anti-aliasing settings. There could be a solution to this, but I don't really see the point when Firefox works beautifully. And Kazehakase, which I'd use if I weren't so enamoured with NoScript :).
As an aside, I think Chrome and Chromium are really only usable (from a UI perspective) on the Mac because they're forced to have full menus. Ditto with Microsoft Office. Well, not that I use that either ;).