With running the risk of appearing to moan, which I'm not!!
I wanted to ask whether it's just me who's finding certain signatures are slowing down the page, therefore computer quite a bit? I haven't really looked into who's it is but I'm sure it'll be the animated ones/GIFs. Causes my page to freeze for a few seconds etc, and it's not that my computers slow, it's pretty fast. It's not that I want to get rid of them though, cause they're cool to look at.
Also being a bit nitpicky now, but would it be good to set a rough dimensions rule for them too? Some are pretty long height ways.