Don't know if it's just my machine here at the office being wierd and holding on to cookies, but when I attempt to log out, then refresh the page to go back to the main page, I'm still logged in. After I get the pop-up confirming that I want to log out, I get the confirmation screen that shows I'm logged out (there is the log-in UserName/Password boxes at the top left) but after I click on any link I'm back to being logged in. I've tried closer the browser and opening it again too.
Why might you ask am I trying to log out? Well, I typically don't since I'm not on a shared computer, but I wanted to provide someone with the direct link to where to go to get information on becoming a paying member.