Broadcastr.com just went live:
Broadcastr.com is a new, free social-media platform for location-based audio and storytelling. Broadcastr lets people easily create and share recordings on an interactive map. We have apps for the Android and iPhone coming out in the next two weeks that will let users hear an automatic stream of stories based on their physical location, like a museum tour of the entire world.
Not really my cup of tea, but I'm sharing the love!