16) AT&T Navigator (Free + $9.99 monthly subscription):
Turn-by-turn GPS navigation, with the $9.99 monthly subscription fee automatically added to your iPhone bill.
17) Gokivo + Yahoo! Local Search ($.99 + subscription):
Get local search and turn-by-turn driving directions.
18) Hey Where Are You (free):
Track your friends on a map. Offers push alerts even when the app isn't running.
19) Mapee Lite (free):
View your Twitter friends on a map.
20) MobileNavigator Europe ($94.99):
Navigon offers turn-by-turn directions for all of Europe. A U.S. version will arrive soon.
21) PlaceTagger ($7.99):
Geotagging software for your photos.
22) airPhoto ($.99):
Share photos over Bluetooth connections.
23) Are My Sites Up (free):
A free companion to the company's paid premium service. It delivers push notifications letting you know the status of your Web sites.
24) Battery Bulb ($.99):
Check the status of your iPhone recharging from across the room with this simple graphical display.
25) ClipShare ($1.99):
Keep multiple clipboards and share them with your desktop.
26) Evernote (free):
This popular note storage app has been upgraded with better voice recordings and the ability to scroll through your entire list without reloading.
27) GeekSearch ($.99):
Search several popular sites from one interface.
28) Remember the Milk (free with a Pro account):
This popular task manager has been upgraded with push notifications, reminding you of tasks you need to get done.
29) Video Notes 3.0 ($9.99):
Store videos on your iPhone and view them anywhere.
30) Zillow Real Estate (free):
This real estate look-up tool now offers push notifications telling you about new results that match your saved searches.