I've never been to a port tasting, sounds like it will be fun. I really enjoy port, we have several bottles of true port and some late Harvest Zins that many of the wineries out here refer to as port, but I'm sorely lacking in knowledge as to what makes a port great.
Looking forward to your tasting notes, perhaps I can learn something.

A computer once beat me at chess, but it was no match for me at kick boxing.