I, Robot - run Android 2.2 on your iPhone 3G
If recent OS updates have rendered your iPhone 3G as much use as a tits on a window, then help may be at hand. Well, it's not really help, more a chance to screw about with your handset and entertain friends of all ages.
If you're confident enough to jailbreak your iPhone then you can enjoy the glory of Android, thanks to Bootlace - a programme that installs Android 2.2.1 Froyo on your jailbroken iPhone without connecting it to a Mac or PC. It's not just 3G handsets you can try this on - the original 2G iPhones are fair game, too.
Blog Redmond Pie has step-by-step instructions for converting your iPhone to Android - it's essentially as simple as downloading an app. And if your iPhone isn't already jailbroken, then there are links to several sites that'll talk you through the process.
Plenty of people have original iPhone and 3G models lying about, so it'll be a fun way to pass an afternoon and earn geek points in the process. It's Android? On an iPhone?? Weeeeeeeee!!!