Has anyone tried this application yet, theres one called logbox as well.
Looks a good bit of fun for a lot less than a gps data logger, if you have an iphone already which I haven't!

http://www.dynolicious.com/

I haven't tried that one but I am using HArrys GPS Lap timer which is a reasonable piece of kit. Gives you alot of information and draws a map of the circuit / road section if it isn't already in the database.

Steve

I have just got this for my phone and it seems really good and reasonable accurate.

For a few quid it is definately worth a go

In a similar vein but for Symbian phones (mostly Nokia) there's a free app called:

http://www.racechrono.com/

Very good for costing nothing. Its more accurate when used with an external 5Hz GPS device though (via Bluetooth).

I logged a load of the recent Alps trip with it but yet to use it around circuits.

You can download most circuits around the world on to it direct from your phone.

I've not used it like that yet but will on my next track day.