Also using Chrome. Very nice so far, unobtrusive with a 'diet' look. For those put off by past experience of Google Toolbar, it is an entirely different box of cats. It doesn't need to run any extra toolbars, as it is made by google already and therefore not needing to run alongside software made by another company.
It also has Incognito mode, ie Porn mode... doesn't save any history or anything. Very impressed so far.
If FF3 is the latest (I lose track of which we're on) then so far it's been about 3 or 4 times faster. This is with all the cookies/history imported from FF.
A useful part of it is that you can open up a 'task manager' within Chrome, which allows you to see what is eating your resources - just like looking at your Processes tab in Windows task manager only for each of your open Chrome tabs (not just Chrome as a program) instead of all windows processes.
I'm finding it v fast, even in comparison with FF3. The only thing I don't like is the lack of lazy man drop down previous list you get with IE. I do like the fast favourite pages though not as convenient as the drop down list. I assume it is something you give for the extra speed.