If you notice, the URL for the forum looks someting like this (taken apart so it posts here):

http://www.gnutellaforums.com/forumdisplay.php?

s=647b219b357b0c4a916dc515295963a6&forumid=5

The s= part is a session ID, unique for each time you come here, and is probably good for 24 hours.

If that number could be tied to a first name or handle that the user types in when he first comes on here, then it would be much less hassle to "log in".

Just a idea.