just for reference, here's what it looks like: http://cl.ly/5rbn doesn't look ugly to me. Looks clean actually...
Clean, perhaps, but absolutely non-native, which is generally considered an ugly quality on OS X.
I understand that it's pre-beta, but if they consider the current GUI to be even a prototype instead of the placeholder that it is, they'll likely never get any traction outside of Java developers trying to cash in on Apple's App Stores.