I just tried out 2.0 Beta, and it's quiet nice... but somehow slow. But the best thing is that it works with the Beta SDK and you're able to run your code without being accepted to the iPhone SDK Beta program.
However there is one thing left... how do I disable that stupid auto correction on 2.0? The "normal" way to expand /Applications/Preferences.app/Keyboard.plist didn't work for me. Did anyone get this to work?