Determining iPhone Model

Question

How do I determine which specific model of iPhone I have?

I know about [UIDevice currentDevice].model will tell me if it's an iPhone or an iPod Touch. Will this tell me if I have a 2G, a 3G, or a 3GS?

Thanks.

EDIT

This also becomes important to me when identifying between a first gen iPod Touch, and a second gen.

Answer 1

See http://stackoverflow.com/questions/688001/how-to-tell-if-your-code-is-running-on-an-iphone-or-an-iphone3g.

Answer 2

google the model number in the about section.