I have also been looking at this and vCaddy as golf gps aid (instead of dropping lots of cash on a SkyCaddy). I found this forum on Greenfinder as well as a review in Golf for Women. Looks VERY promising. One question is the GPS in the iPhone better than that in the 8300 BBs?
http://www.torontogolfnuts.com/showthread.php?p=273267
Review:
http://www.golfforwomen.com/gear/pro...e=3#showHeader