URGENT - AIM Help

I need the help of one of you computer guys (prstudio, are you listening?); my buddy’s laptop got stolen a couple of weeks ago… the guy who stole it has been using my friend’s screen name. He’s online right now. I need to get his IP address (or something else to ID him). Any way I can do this? The only way I know of is for him to direct connect with me, or for him to click on a link that will log the IP.