iOS 5 on iPhone 2G, iPod Touch 1G

upgrade old iphone to new iOS5:

Whited00r 5.1 is a customized version of Apple’s official iOS 5, only it’ll run on all iPod Touches and anything after the original iPhone, bringing most of the features of the latest OS. You get multitasking, reminders, a kind of hacked-together iCloud which uses DropBox as its back end, home-screen folders, Newsstand and even custom home-screen backgrounds.

What you don’t get is Notification Center or the App Store.

Whited00r is free, and is installed using iTunes, just as if you were doing a restore of regular Apple software. It is also completely unofficial, and although I haven’t read anything bad about it, putting an entire OS of unknown origins on your phone could obviously be a security risk. Buyer beware and all that.