is pretty slick: they screen-scrape various event calendars, you tell them what bands you're interested in, and they mail you when they're coming to town.
But the cool part is that "give them your list of bands" is moderately painless: you can upload an iTunes playlist, and they pull the band names out of it. (There's a size limit, so I had to make a few passes to get everything in there, but it wasn't too hard.)
They also export an iCal feed of only your bands, which is awesome.
Who is this fabulous new hipster band I hear in the trailer for Marie Antoinette
? Oh, it's Gang of Four, Natural's Not In It
. Who's this next band? They sound very emo and modern. Oh, it's New Order, Ceremony
It looks very pretty, but I do not think this will be a good film.