A good list of iPhone APPS for those world travelers is listed here.
New York on Tap
Use this well-designed application to find bars in New York, as well as subway stops and directions.Hotel Widgets
A hotel finder
Earthcomber
Gas station, wi-fi spots, emergency etc
Sudoku for iPhone
For the Geeks
iEventful
For the party seeker
SoonR
The Skype Freak
iPhone Miles
Mile tracker for [...]
Filled Under: iphone apps
MyVu Shades
MyVu Crystle 