Agree completely about Scratch. We have a love/hate relationship with it--it gets about 80% right but it isn't pretty and onboarding is a struggle. Scratch 2.0 will be coming soon with some improvements but still in Flash (!!)

The great thing about visual programming languages is that kids can focus more on the concepts and less on bugs due to syntax/typo errors. We're working on one for the iPad called Hopscotch - gethopscotch.com.