I seem to be unable to renew my membership. I click the "Profile" link, then I click "Join now". Then I'm presented with a form asking for username/password/email (even though I've already registered). Once I submit this form, I get a ccbill billing page. Once I fill out these fields, I receive an error: "You already have an existing membership to this site".
My credit card recently expired -- I'm not sure if this has anything to do with my problems.