This page contains references to work on agents. Some were sent to me, so I cannot vouch for their usefulness. If you feel that anything here is inappropriate, please email me.
http://www.cs.umbc.edu/agents/kse/kif/
http://www.networking.ibm.com/iag/iaghome.html
http://www.trcinc.com/news/iagents/index.html
http://www-ksl.stanford.edu/knowledge-sharing/agents.html