There's no way I can go two weeks without visiting my site! But, it's simple enough to delete everything in my sessions directory. Ok, you're at least partially right, since I had to relogin. But, setting a longer expiration for the cookie still has the desired effect (i.e. I don't have to relogin all the time).
So, if you want to use sessions, but want don't want to have your users login for each visit, just set the cookie lifetime up a bit. As long as the users visit the forum once every couple of days it shouldn't log them out right? And if they don't visit that much, they'll just have to put up with relogging in won't they? []/w3timages/icons/smile.gif[/]
I think the BEST thing would be if W3T set a standard cookie and used that to authenticate first. If it recognizes the user, then it automatically starts a session for them. If not, then they're required to login. So, initial login via cookie, subsequent authentication via sessions. Is that possible?