I'm driving to work right now. It would be really cool if it did live gps tracking but it doesn't. It's still really cool. This page was designed for the pre..performs well since it is the same resolution as the iPhone.
Yes the link is above.
no..but once 3.0 is out, there will be many companies coming out with their own turn-by-turn navigation apps. The companies will also provide the maps as well, so you will be able to do this offline. Im guessing there will be many options out there very soon...the first company to release a fully operational GPS app for the iphone will likely by Sygic: http://www.iphonehacks.com/2009/02/sygic-demos-turnbyturn-gps-iphone-app-with-voice-navigation.html