I'm a recent convert from Blackberry to iPhone as well. Very impressed...neat little gadget. The usability is fantastic but the apps are the real paradigm shift. Take racing for example. Some guys are using just their iPhone for in-car video, lap times, and data logging. There's an app I have seen called Harry's Lap Timer which is pretty cool. http://gps-laptimer.de/Home.html Gives you lap times, sector times, mph at different points, OBDII data logging, shows your lines, analyzes braking points, g-forces, etc. and overlays it all with in-car video (taken from your iPhone). Here's the mph output from a buddy's lap at ECR when he was playing with it...it's not Motec or anything but looks fairly useful for a $9 app:
http://i1041.photobucket.com/albums/...S/Laptimer.png
Marshall - I didn't think about it until just now but this might be a cheap, easy way to do some of the testing we want to do in AI next season if you don't already have a better solution lined up. Disclaimer - I don't yet own this app, am not affiliated with it in any way and have never tested it myself. I can't vouch for the accuracy or consistency of results. Just a thought...