Other World Computing is selling the 64GB Kit that's eight 8GB DDR3 EEC Ram Modules for $3,559.99 ironically its the same price Apple sells the 32GB Kit for at the Apple Store when getting the configure to order option. Link is below! I'm happy new goal for 2010 is now a Mac Pro 2.93GHz (8-Core) Nahalem, four 2TB Western Digital Black with Apple Raid and 64GB DDR3! 
http://eshop.macsales.com/item/Other World Computing/85MP3S8M64GK/
http://eshop.macsales.com/item/Other World Computing/85MP3S8M64GK/