After trying out Pandora, iTunes Radio and Rdio/Spotify for awhile I can confidently say that Songza has by far the best ‘radio stations’. Curated playlists are much better done at Songza than any other app out there.
Why I want Apple to buy them? I wish there was tighter integration into my devices. Favoriting playlists, songs. Being able to purchase individual songs and use the service directly from within iTunes. Also: I want it on my Apple TV and so far it seems Apple is allowing TV/video apps/stations but no music stations on Apple TV.
Yes, Songza works fine via Airplay, but there are too many interruptions if I use the device to Airplay and do other stuff at the same time.
So, Apple, buy the Songza team and build their amazing curation service right into iTunes Radio. Thank you!