The search space is all tunes that have been played on Soundwave from all sources plus a large source with a huge catalog. Soundwave sources include Android Native, iTunes, Spotify, Deezer, Rdio, Pandora, Deezer and a few others. The authority source has a about 20 million tracks.

Bandcamp is not something we have support for right now, but it's been requested a number of times, and we like to listen to our users. Soundcloud support was a result of a very vocal group of users with the same perspective as you have.

Stay tuned!

There may or may not be other easter eggs on the site... The app is awesome too!