You can find some posts on signatures in the General Discussions forum. You can also do a picture search on
Google, try "free animated fantasy gifs" or something, whatever picture you need. Lastly, you can use the Infinity Explorer (from TeamBG) to strip animations from the game itself, but this is more of an advanced option.
You best bet would be to check the GenD forum I think - lots of nice people there wanting to help you out with your sig [img]smile.gif[/img]
BTW, did you notice Ziroc has a few animations in the graphics library, too? [img]smile.gif[/img]