Pandora.com social features

Andrew wrote a post back in February describing Last.fm's social features that sounded interesting. I wanted to learn what was going on, socially speaking, at Pandora.com, the web-based customizable streaming audio service. Since I last used them they've added a number of worthwhile social features, including sharing of stations with pre-defined networks of friends, and publishing RSS feeds of your favorite stations and bookmarked songs. They don't seem to be up-to-speed yet with APIs for importing/exporting social network information (maybe soon?). But I did appreciate the 'find other listeners' feature that lets you search for other relevant profiles, stations, and artists.