Or if you have the Developer Tools installed,use PropertyList Editor to open the .plist file. Much easier to edit it that way than by using vi or pico or (shudder) emacs.
The chimera team has posted a build available for download. I tried it out and wow this thing looks sweet! It's still not usable, but you can open up webpages and do some general goofing off with it.
Dayamm! This looks sweet!
Not much works beyond loading a webpage, but it sure is fast, and uses the Aqua GUI very nicely.
I'm gonna keep an eye on this one!