7 IPhone apps worth having

Submission day today! This month's submission comes from GadgetMan, thanks for your assistance :D

1. Last.FM - to listen to new music.
2. WiiFinder - to list all WiFi hotspots around your location.
3. GuitarToolkit - tuner and guitar chords ... useful for guitarist.
4. Shazam - to sample music playing where you are to find the artist details.
5. Facebook - to update your facebook status etc.
6. SplashID - to securely hold useful information.
7. Crash Kart - fun game to play when you have down time.