LoKast

LoKast allows people to share media with nearby users, at super-fast speeds - TechCrunch

Using LoKast you can share your music, videos, photos, contacts, and web links with other users nearby, and instantly discover others and their shared media. Extending on the notion of Broadcast Networks, LoKast effectively turns your mobile device into a localized, high-speed content server - nearby users simply tune into your LoKast to view the media you share side-by-side with you and right as you share it. Available cross-platform on Android and iPhone devices.