Here's another service with a weird name that promises mobile access to your iTunes library. nuTsie, just like AVVENU, gets music from your iTunes library and streams it to your smartphone or PDA phone via its data connection. Although that's where many similarities end.

AVVENU uses the Internet to stream music files to your mobile. This means you'll need to keep your PC at home--or whatever computer is storing your music library--on to access your songs. The advantage with this approach is that as you add songs to your music library, you'll be able to play them on your gadget. AVVENU currently works on Windows Mobile 5 devices.

nuTsie on the other hand works for various Nokia, Samsung and Motorola smartphones. It compares the list of your songs in iTunes with music already stored on its servers. This means you don't have to keep a computer on, because the music is streamed from nuTsie itself. Unfortunately, if your music collection has obscure songs, nuTsie may not have a copy available. And if you add new music to your iTunes library, you'll have to update the list nuTsie has.

Personally, nuTsie seems like a more convenient service. You don't have to leave a computer on, meaning you'll save on the electric bill. And what if you're computer suddenly shuts down or loses power while you're away?

One thing's for sure though: if you use either service, make sure to get an unlimited data plan. Unless you like paying costly monthly bills.