http://www.alchemymindworks.comthis site boasts a fantastic .gif animation package thats easy to use and very effective. the shareware version is available for download.
'Gif construction set pro'
made my avatard with this. It combines a animation page with MS paint, or you can set it up to work with PS, adobe, etc.
this one is quite cool, took a few hours though, and nearly 900 frames

could be done alot better though, and viewing it in this way through an image link makes it slow down horribly in places.
edit: hit refresh to restart.