This year during the WWDC keynote, I particularly got excited when navigation applications were announced — I'm not the best with directions. Well, AT&T has just released their TeleNav Navigation Application for the iPhone, which is a free app to download, but it is rumored to cost $10 for monthly service. Now, I really enjoyed the TeleNav Navigator on my BlackBerry when I took it for a test drive, and monthly service on that is about $10 as well. But keep in mind you don't have to pay $100 for the receiver when you are using your iPhone. . . so you save that much money right off the bat. AT&T also allows you to cancel the service at anytime — perfect for those times when you leave town or you're not using it very often.