I came across this exceptionally useful, $2 app. Motion X GPS HD.

http://news.motionx.com/category/motionx-gps/

It's exclusively for the iPhone and iPad. Not just another GPS app, because of the downloadable maps this is an effective GPS replacement.

Free downloadable maps for offline access -- i.e. use your phone's GPS when you're out of cell service. Select the area and zoom detail level (I found a 14 to be the best bang for the buck) and download before you leave (I recommend downloading over night). The entire state at near-street level runs about a gigabyte in size. Street level is 3-4x the file size.

Live updates!! Automatically send real-time updates of your location via email, facebook, twitter and/or other Motion X GPS users.

Select the 5 digit "channel" (any number between 11111 and 99999), have your friends do the same and now everyone will appear on each other's map in real time (depending on the update frequency you set).

You can also manually "check in" which generates a email or facebook link

Trip tracker Record and share your route. Records time, distance, speed, average speed, alt, ect.

For $2 it's a steal and highly recommended!

Grab a ram-mount mount and you're golden.

http://www.ram-mount.com/Products/Mo...8/Default.aspx