Also check out the dogcam bulletcam. Records in 720p and comes in under £100.
http://www.dogcamsport.co.uk/dogcam-...hd-camera.html
For GPS I found an app last night called Diablo Super Biker - it's free on the App store. I've only trialled it on my way to work this morning but it seemed to be pretty good. You get lean angle too!
http://itunes.apple.com/gb/app/diabl...451756374?mt=8
Hoping to use this on my trackday in August