Of course, I'm having a hell of a time with it. Pandora suggests new music based on one or more artists or songs you select; the service's licensing agreements don't allow on-demand playback. Rather, playlists/stations are fine-tuned by giving each selection a yes or no vote when it's played.
The problem is two-fold: each artist I select for the station acts as a "seed," which is just as likely as any other to generate a set of songs (which may include one or two by the seeded artist) ... and the artists are so diverse that focusing the playlist to selections by, for the most part, only seeded artists, will take a long time, if it's even possible. (You can only skip through six songs per hour.)
So for what it's worth, here it is:
It'll get more focused with time, of course, as I fine-tune. I don't think it can be a group effort, though ... in other words, if someone else listens to the station and fine-tunes it, it becomes a new station, personalized for that person, rather than further focus the original station.