The Dance Gypsy is one of two well-regarded databases of performers and events in the contra dance scene. I've been linking to entries using the "fan page" AR, but it would be better if it was added to the whitelist, so it could come up automatically. It does have a rather annoying donation request page, that interrupts links, but even so, it's probably worth linking to.

Examples:

http://www.thedancegypsy.com/performerList.php?musician=George+Marshall
http://www.thedancegypsy.com/performerList.php?band=Swallowtail
http://www.thedancegypsy.com/eventList.php?dance=76&month=12&week=1&instance=0