Yup, that's what I thought.
But basically, it watches what your musical tastes are (from your playlists) and then then fills out your playlist with similar 'moods' of songs. And when you've used it for a while, apparently you can activate 'neighbour mode' and have other people's recommendations based on your playlist.
If you're an audiophile like me, any new way to discover music is great. But if you don't have to jump between several websites, especially when feeling lazy, or drunk, then that really is a bonus feature.
Roll on the next Media Portal update.