Wow… I feel special for a change. I personally know the person that made this program. He does network security and AUP/TOS enforcement. This was taken from his site

About AIM Sniff
AIM Sniff is a utility for monitoring and archiving AOL Instant Messenger messages across a network. You can either do a live dump (actively sniff the network) or read a PCAP file and parse the file for IM messages. You also have the option of dumping the information to a MySQL database, a flat file, STDOUT, or any combination of the three. AIM Sniff allows administrators to see how often users are chatting to monitor for abuse and you can also use AIM Sniff to monitor for cases of harassment or pirated software trading. It has been tested on FreeBSD, Linux, and OS X.

I’ve tried it myself (on linux) although someone has done a windows port. Basically he made it using a packet sniffer called ethereal. He sent messages to friends, caught the packets, and used this to reverse engineer the toc protocol himself. As I said I don’t know about the windows program, but I just ran the prog from the command prompt, and blamo…. “there’s nothing like the smell of fresh IMs in the morning”

Man… i wish i knew Java and could help. Well props to open source anyway.