Here's my list of my top twenty apps (All on the iTunes Store for download - some free, some not):
Great for checking mail anywhere, anytime. Awesome preview of attachments (no saving :-( ). My favourite way to blog.
The best Mobile Web experience around!
For keeping up with all my RSS Feeds.
Instant Messaging extraordinaire!, also includes Skype, Gmail notifier, and Twitter posts.
Finally Twitter makes sense ;-) Includes GPS and Photo microblogging to Twitter.
6. YouTube App
Search, bookmark, email, blob-out to YouTube Videos on the awesomely viewable screen!
7. Google App
Shortcut to Googles Mobile Web Services - formatted for iPhone.
A social Media-blogging hub!
9. Google Earth
Cool maps! Zoom in on your house!
Ditch the cassette recorder - record your musical masterpieces in multitrack using FourTrack.
Easy Mac & PC file-sharing with iPhone.
12. Bible reader
Carry a searchable Bible everywhere!
13. Path Tracker
Track your movements over Google Maps and save the path - could be a great car-rally or treasure hunt tool!
14. Mobile Fotos
Flickr on your iPhone.
Create some musical inspiration - WOW!
16. Comic Touch
Annotate your pics.
How loud is that music???
Record a voice note or audio PODCast.
Edit your audio recordings on the iPhone
Test how fast your internet connection is - is Telecom/Vodafone ripping you off???