Requires firmware 4.2.1+
Requires Greenpois0n's BootLogo animate tool, it will be installed automatically

Here is a cool 4.2.1 boot logo. It is not that good yet, I will update this to fix a lot of these problems. Features a pwnapple coming from the corner of the screen and covering the apple, then putting up a pwned logo..

BootLogo is configured from Settings.app

See More Info below for Screenshots