Unfortunately, it's still just a tech demo and not really a full-fledged browser (and the guys behind it, Mesa Dynamics, say that they didn't even try doing the cool stuff that the real OS X Chromium team is working on). But they did create a multi-process browser (one per tab), and they used some of the tech from their other app, Hypercube (Edit: NOT HyperCard, sorry -- I would have been more excited about that, too) to do it. I haven't tried it (I haven't tried the real Chrome on Windows either, Firefox is good enough for me so far), but like the other OS X Chrome, this app really only exists just so it can.
And it shows just how desperate OS X users are to get their hands on Google's browser. Just how much longer do we have to wait?