This is such a Very Good Idea that we're kicking ourselves for not thinking of it first, making our fortunes and retiring to Barbados with the Italian female beach volleyball team.

This is the Dynolicious application, a program for the iPhone and iTouch from BunsenTech. Basically, it uses the accelerometer in your iThingy to measure 0-60mph times, lateral Gs and even horsepower.

We're not quite sure how it'll manage the latter, but apparently it's got something to do with kerbweight and acceleration and, erm, the tide times. It sounds like witchcraft to us.

You don't need to plug your iPhone into your car or wire it up or anything complicated like that - Dynolicious does all of its clever stuff just sitting on your dash.

BunsenTech reckons it's accurate to within 0.08 of a second over a 0-60mph sprint. We haven't actually had a chance to test it out yet, but we'll let you know when we do.

Yes, it's a bit geeky, but we still want one. You can buy the Dynolicious application from iTunes for about 13 of your finest American dollars. It'll be a bit useless without an iPhone, though.