So I've downloaded and tried out Chrome. It's cute. It renders well. It might be a teensy bit faster on app heavy sites. It does not, however, have all my must-have Firefox plugins (speed dial, ad blocker plus, stylish, greasemonkey, etc...) and therefore I will not be switching my browser default.
I'm not sure who Google's target audience is for this. Folks who use google apps a lot? Multimedia developers? Kids who want the latest shiny toy? If they're trying to woo over the Firefox crowd they'll have to address plug in compatibility, as I'd say most heavy firefox users have at least one plug in you'd need to pry from their cold dead motherboard. IE users, of course, are the low hanging fruit - but if they haven't jumped ship for Firefox, why would they go for Chrome?

