They were working on the site the other day so the might still be upgrading,
We'll be conducting more behind-the-scenes upgrades on Tuesday, February 28th, 2012 to make your time on SideshowCollectibles.com even better! During this period you may find that you have restricted access to your online Sideshow account and may not be able to place an order or update your account information. If you wish to place an order or change your account info, please feel free to contact our Customer Service Department directly by phone or through live chat during our business hours on Tuesday, February 28th, 2012 from 8:30AM - 5:30PM (Pacific Time)!