Tonight my kids and I enjoyed a video conference with their grandparents using the iSight web cam. I purchased two of them at the local Apple store and gave one to the grandparents.
Before we began this evening, we ran into one snag. I had to open up some ports on my Linksys firewall. With the help of google, I found an article that covers the topic of opening ports on your firewall for iChat AV.
Chat uses the following ports:
* 5060 (UDP)
*aol 5190 (TCP) File Sharing and/or America-Online
* 16384-16403 (UDP) To video conference with other clients