Check out the dyno app for the iPhone...HolyCrap!!<ul><li><a href="http://www.youtube.com/watch?v=0-DFbJQbeSY">clicky</a></li></ul>

why does an IPhone have an accelerometer built in? It must be part of the GPS system? I guess.. They are not a cheap add-on for any system so what is the purpose? And another thought my girlfriend has the new IPhone and man it is embarrassing how much it blows away the original for half the price.. I don't like apple cause I am basically stubborn(don't own one apple product)but the older I get the more I want in....