Recent versions of AIM have not only included person-to-person text messaging, and chatroom messaging, but also the ability to share files peer-to-peer with your buddies (unlike Napster, and other peer-to-peer software, there is no directory of files, you only transfer files to one another as one would in an email), and to play games against one another (currently only available to Windows users). All of your buddies are stored on AOL's servers, so you can talk to your buddies from any computer with internet access, provided you have the software, or even use [AIM Express]? which uses Java in a pop-up window in your browser that allows the basic functions of person-to-person text messaging.
The software is free, and is avalible for Windows, Mac?, Linux, [Windows CE]?, [Palm Pilot]? and AIM Express is available to anyone with a Java enabled browser.
To download AIM, or find out more information go to http://www.aim.com/.