I built it myself from sources, using their instructions. Not too difficult, but a lot of steps.
You need to have the Atheros wireless, and not Broadcom. There's a sticker on the bottom of the case.
Unfortunately, it's not fast enough to play Hulu video without skipping, which plays fine with Windows. This is apparently a generic Flash-on-Linux issue; it didn't work with Ubuntu Netbook Remix either.
I appreciate what Google is trying to do. But when they finally release the official Chrome OS at the end of the year, I suppose the hardware will definitely be better, and offer a better overall experience. People will try to take the open source Chromium OS code and shoe-horn it into other boxes, but it will not be good enough.