For anyone and everyone interested in Port Scan Attacks, I thought this might help. Whether you already know and this is rehashing your knowledge, or you're a dunce like myself and thought prior to coming here to AO, that ports are where ships docked at.
I hope this is good info

http://www.dshield.org/topports.html
Plenty of links and explanations

This website is pretty informative, hopefully you check some of the other links out on it. IF you don't and you're entirely too lazy to browse this sight (I know, I'm a lazy bastard myself) for the good links, I'll just post the page with the link summary for you.
http://www.dshield.org/links.html