Simplify Media Streams Your iTunes Library to your iPhone / iPod touch

Simplify Media is free for a limited time as a download from Apple's App Store. This application (which will be $3.99 after 100,000 downloads) allows your computer to stream your iTunes library remotely to your iPhone or iPod touch; this works over WiFi as well as EDGE and 3G; DRM'd iTunes purchases can't be played, but everything else can be. Potenitally, this app may be a controversial one, as it allows users to share their libraries with other people; however, the library is shared via a list of users to be allowed on, so I don't see too much of a problem; the program allows for sharing for up to 30 people, but I'm guessing that performance will suffer before that limit is reached.