That was, until I deleted my Software Update preferences directory, and turned off my HTTP proxy in the Network control panel. Open up terminal.app 2. Quit and restart System Preferences, and now go back into Software Update. It should work now. All the settings will be back at their defaults, though.
Classic is definitely more stable.
Screen redraws are still as they were, namely not as fast as I'd like. For a 0.1 update, though, it's a good effort. No noticeable differences really, still have to plug my speakers into the front of the imac rather than the audio jack on the side too. In other interesting news, Apple also released the first official version of Darwin for x86. Start up the rumor mill.