less of sarah - there isn't a way to update your current ticker. You will just have to delete the old one at User CP, then go back to the ticker site and create a new/updated version and put it in your sig like you did the first time.
Shelly, I hadn't looked at this thread for a while...and I noticed that you changed your ticker. I didnt want you to have to change yours, I just thought it was kinda funny that we picked the same thing. I feel so bad that you didn't use it after I said that.
I wanted to be just like you guys when I grew up! 
