I can see it when I'm signed in. I probably won't sign out to try it the other way.

The URL is the same for the one in your sig and the one in NoCake's reply:

http://signatures.mylivesignature.com/54486/237/90E1D917D4BA99640786410369718BB7.png

Is there any reason you might not be able to view stuff that's linked from that site?