I already had upgraded to an 80GB iPod fairly recently so I saw little reason to get the 16GB iPhone as I didn’t plan on using it for my music.  A feel my decision was a bit prescient now that I’ve installed Simplify Media on my iPhone.  This quite cool little application lets you stream your music collection to your iPhone.  No limitations, no fee.  It even plays music purchased from the iTunes music store.  Not only that, it lets you create a buddy list with whom you can share your library with.  This is probably the most impressive application for the iPhone I’ve seen so far.