You can also pay via credit card with the mail-in form found on the above thread. Here's a direct link to the form. I've also clarified the wording in that post so that payment option is more apparent.
I'm in sort of the same situation as Janet (noticed that the Premium Member designation had disappeared from under my name after trying to post an attachment recently), but I have a recurring membership and my credit card bill shows a payment to COTH via PayPal on April 29, 2010
Found your payment! I'm not sure why your account wasn't automatically updated--there's a recurring subscription and a regular one that was expired associated with your account, so maybe it was something goofy with that.
At any rate, we just reactivated your Premium status through July 30, 2011 (a couple of bonus weeks for your trouble!).
Thanks so much for your continued support of the Forums!
I bet it was something along those lines, and I'm having trouble getting rid of one of the subscriptions, so if you have the same trouble next year if you decide to so generously support the Forums again , just give another holler!