Google CEO Eric Schmidt says Chrome for Macs is coming in a couple months, but if you're impatient and only mildly adventurous, you can run it a surprisingly solid early version right now.
Google warns that the early access developer release "still lacks certain privacy features, and is not appropriate for general consumer use." Fair enough, but if you're just dicking around and want to get a feel for the interface and speed (which we like), it's good enough now you can watch Hulu and do everyday without crashies (though you might see some weird drawing errors when there's Flash involved).
You can also try the nightly builds of Chromium (the open source part of Chrome, essentially). Just don't cry if you run into any bugs, 'cause we're not even talking beta here, k? [Direct Download (DMG file), Chrome Dev Channel, Chromium Builds]