Animate is a software bundled in Greenpois0n RC5 that enables users to display (a sequence of) PNG images on boot. This approach has the advantage of being usable on all devices, regardless of their ability of accepting custom firmware, and supporting animated boot logos. The original boot logo will always show first.
The Animate tweak has been released on Cydia but it is invisible for some reason. To install it, search and install a package named Apple boot logo (animate is a dependency). After the installation, a new tab will appear in the Settings App named BootLogos. Anyone having trouble keeping settings should be sure that /Library/BootLogos/ is shown mobile:mobile. Sometime uninstalling all boot animation packages and reinstalling fixes this issue. Animate conflicts with the package ImageMagick. It has to be removed in order to successfully install Animate. Currently, Cydia will not display a conflict, but the conflict is still there.