Beginning April 1st 2011 you can renew and apply for membership online with a credit card using the PayPal system.
Please be advised that Membership fees have gone up for the 2011-2012 fiscal year:
Full: $100
Affiliate: $50
Retired: $50
Student: $18
Please see the related post: Important Instructions: Registering Online, Obtaining a Login ID, and Password for details on how to renew.