Early 2009 Mac Pro now up to 64GB!
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.../85MP3S8M64GK/

http://eshop.macsales.com/item/Other.../85MP3S8M64GK/
Comments
I don't see how i'd go back to using anything with less specs.
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.../85MP3S8M64GK/