I took that signature, as it was the first I saw when I remembered. Basically, I was wondering how I would go about doing what he did - making a .jpg refresh every time the client downloads it again.
I have a web host and a domain, so I'm set there - I just need to know the script, or how to make it dynamically update (according to a timer, let's say, or a random number - so when people refresh, they see a different image).
I'm thinking of doing this for my own signature, so that when people refresh the page, or see a differnet post by me, I'll have a different signature (and/or avatar for that matter).
Edit: I remember someone recently did this, where everyone submitted a random phrase and when you refreshed the page, you would see a different phrase that was submitted.