How'd I make the siggy? I copied and pasted the link you had in there originally, copied the link's location, went to
Tinypic, remote hosted/loaded it there, copied the link and pasted it back here so you could see it. Tinypic allows you to adjust the image size, which I did, and I chose 'thumbnail' which is what you see in your siggy now.
They prefer you don't just hotlink a picture - which is what you did, by just boosting it off the internet. Tinypic or Imageshack or Photobucket or anything similar to that, are free remote picture hosts - Tinypic doesn't require an account (though you can make one if you like) but the other two do.