WMPowerUser have a list of the features available:
- Login
- Login using a Pandora.com
- Anonymous login
- Radio Stations
- Retrieving a List of stations for a user
- Deleting a station
- Renaming a station
- Creating new stations based on Artist or Song Search
- Songs
- Getting an MP3 Playlist for a Radio Station
- Rating a song as “Thumbs Up” or “Thumbs Down”
- Banning songs
- Sharing songs via email
- Miscellaneous
- Syncing server-time with the server
- Checking for Geo-fencing
We'll flag up that as a hacked together third party API, this can't be guaranteed to work for ever, but when has that ever stopped the developers on the cutting edge from making some cool tools?