What should I do with my Apple iPhone 3GS?

My new iPhone 5 is (finally) going to be delivered within the next couple days and I'll no longer be a slave to my cracked screen and slow running iPhone 3GS. I know I could sell it, but I'll only score something like $30 for it, I could just keep it around for a backup iPod Touch (and phone if something happens to the 5), but that seems like a waste of all this technology. There's got to be something cool I can do with an iPhone 3GS now that it will no longer be used primarily as its intended purpose. So what kind of cool stuff can I find to do with my old iPhone, people? Link me up with something really cool…

Give it to me! Or smash it and make a youtube video about it.

Have you considered using a service like NextWorth to sell it? You can get a free price quote on their website http://nextworth.com.

Sell it to Laptopheaven or CashForBerrys.com
So you can get fast cash, They also provide free shipping.