An App I Would Like To See

In Facebook, I have listed most of the musical artists I would go out of my way to listen to or go see.

A few months back Sara Bareilles came to Wake Forest University, about 2 hours from here.  I have been a big fan for a while now, and had wanted to see her live.  I happened to check her website a month or so before the show and found out she was coming.  Otherwise I would have missed it.  That seems crazy to me.

I have chosen to make this information public in my profile, so it seems like there is an opportunity to build a simple app that would take things like tour schedules for artists and make sure I know about them.  Write on my wall or send me a message when artists I care about are within a radius I specify.

For instance, I might travel 500 miles to see U2, but only 50 miles to see Eminem or five steps out my front door to see Brittany Spears.  Using a Facebook app, I could add artists I want to see and select the radius.

Does this exist out there and I am just not finding it?  Or is there something similar / better?  Let me know!