The wait is over. Google Chrome for Mac is now available in beta. Its still missing a few features that are in the Windows version (like support for extensions), but the browser is lickety-split and more-or-less stable.
One little feature I like, which Chrome borrows from Safari, is that when you click on a new tab, it shows you a gallery of recent sites youve visited. And you can drag a tab off to detach it as a separate window. Handy.