Show HN:Music Stream - stream music between iOS devices

I've always wanted the ability to stream music from one of my iOS devices to another. I just created an app that lets you accomplish that. The app went live on the App Store yesterday. Please let me know what you think. I've included 10 promo codes for people to check it out.

http://itunes.apple.com/us/app/music-stream/id542197031?ls=1&mt=8

Promo Codes: LPK4JLJ3NAAH X3M9XR4PTJTY 9YW6AKJYYWXA 63AXFHR76Y49 MMKMM99AXTAY 37MYAHFWK4EN F97F9FMK6LXY KJENJ9RYPHRE MHYKRM63P4XM RWHHTNEAFE69