So I downloaded the latest hexxeh build for VirtualBox, and it boots to what appears to be a setup screen but the "Continue" button is grayed out, I suspect because it's not picking up the VirtualBox network adapter.
I have no "real" reason to use ChromeOS, I'm perfectly happy with Ubuntu, I just wanted to play around with it and see what it was all about, thought it'd be cool to be able to educate myself about it a little bit.