While most of the discussed use of SuSE here has been as a superior desktop 
distribution, I know I've mentioned before that SuSE has long been 
established in the commercial server market.

From a few days ago on slashdot, here is CNet's article on SuSE receiving EAL3 
certification: http://zdnet.com.com/2100-1104_2-5144199.html

RedHat, on the other hand, has yet to reach EAL2.