This page will teach you how to make hyperlinks that when clicked on will preform AIM tasks.

Go IM - This one is good to enter into chat rooms, have everyone click it at once and the victim is creeped, not to mention their screen is filled with boxes.
aim:goim?screenname=EneterScreenNameHere&messgae=EnterMessageHere

Go Chat - Ever want to invite yourself into a chat room?
aim:gochat?roomname=EneterRoomNameHere

Add buddy - Good feature in a website.
aim:addbuddy?screename=EnterScreeNameHere&groupname=EneterGroupNameHere

Change Icon - Once again good feature in a website.
aim:buddyicon?scr=http://TheWebSiteHere.com/TheFileNameHere.gif

If you find this information inaccurate or have questions post in the forums