No, you only need to pay the initial fee (I think it's 20k) to create the clan. So long as the clan stays active, there's nothing else you need to do. You also need to pay an extra fee to receive a password-protected sub-forum (like our Seekrit Forumz thread). As far as I know, there aren't any recurring fees.

Also Kowgan, I put up all the info that I had in the Time Zones thread. Floyd, you should go into that thread and post your availability, too. :P