The plan is for 3 of these chassis:
http://www.supermicro.com/products/system/2U/2027/SYS-2027TR-H71RF_.cfm
With each server node having: E5-2690 (8 core) x2, 256GB RAM, 900GB Seagate enterprise drives (Savvio) x 6, InfiniBand interconnect (56Gbit)
So a total of 12 servers in 6U of space.
We only use servers for digitalpoint.com... There are a lot of backend things going on... Serving up Geovisitors tool, serving ads on sites using Digital Point Ads, search engine rank checking for millions of keywords from our Keyword Tracker tool, etc.