As you know Skinbase smileys work though incl. animated ones, only ours right now. Sometimes I save favorite signatures with smileys as a macro. This only works as an encoded text (think I did it with unicode-8 in notepad). Maybe a link to your image works. I forgot what came out of that, think I did it once. Links DO work in sigs here. So you can make an external signature on your own site and link to text marker leading directly to the signature passage on your private page. Then in your sig here you say click link to see my animated signature. On your own page you can then use any animation type your own domain supports. Of course it also depends on which browser people use whether they can see all your effects. Plus whether or not you consider wc3t Standards or what its called... <br /> <br />
http://tobielsayre.online.de/#Signature