Woo Hoo! Just get it!
http://www.google.com/chrome
Fisrt impression - very fast...

Tried my site that was developed and tested in FF, IE 7 and Safari - no visual problems, anything.
What's good - very large display/client area... no header. And looks very clean. I don't see that usual Safari's text anti-aliasing in XP... and this is good.
And Gmail works very-very fast, I think JS engine is really optimized. Let's hope that my first impression is right.
Some big screenshots here:
chrome3.jpg (593,48 kb)
chrome4.jpg (489,40 kb)
Download link:
http://www.google.com/chrome