I was on one site where the site got hacked and the hackers stole the list of names and email addresses that weren`t publically visible and then posted them onto another site. Luckily it was my gmail account and the spam filtering there is pretty good. I would have been really upset if it had been my email account at my ISP!
I have noticed that if you are reading a review that someone has written, you can see their profile. There doesn`t seem to be a way to get to profiles from the forums. It would be nice to be able to look at someone`s profile when reading their forum posts.
The ability to list facebook, myspace and yahooIM links would be good, but it would be best if they were only visible to logged in members.