The Google Chrome browser is quite interesting. It's rather fast because of the use of Webkit, it looks rather slick and it shows that there's gone quite some thought into the default features. I miss mouse gestures, adblock and bookmark sync though. Not sure whether Google itself will ever come up with an adblock plugin though ;)
Also, by default the chrome of Chrome takes up more space than my tweaked Firefox layout.
BTW, for getting the Flash plugin to work quickly with your Chrome install (when not having admin rights on your windows pc, like I have at work), copy the Flash plugin .dll from Firefox' plugin dir to a directory similar to C:Documents and Settings