Get Animated Working Live Clock on iOS 4.1 Homescreen on iPhone and iPod touch [Jailbreak Req]
A new tweak is now available on Cydia which brings the ability to turn the icon of the stock “Clock” app into a fully live and working clock on iOS 4.1 devices! You can even customize the animation, or change the look of it if you have Winterboard installed from Cydia!
Animated Clock icon on the SprinBoard
Adds customizable animation to the SpringBoard Clock icon.
Includes a few extra themes for use with WinterBoard (if its installed)
Does not work on some older models
Yes this tweak has been available since iOS 3.x days, but this new update makes it fully compatible with new devices running iOS 4.1.