Try out Jolicloud? I don't have a CR-48 and so I tried installing Jolicloud on my laptop but it wouldn't recognize my wireless, other than that, it seemed cool.
There's something weird about the hardware specialization with chromeos though. About fall 2010 I accidentally my whole win 7 notebook and installed a copy of chromeos onto the harddrive before switching to arch Linux. Twas terribly slow and unresponsive, but this may have just been because of it still being a sec build not designed for a dualcore lenovo box.
Happy to report CR-48 is much more stable and fast with latest daily images.