I think this is exciting. IBM is announcing support for Windows as part of the zEnterprise. Here is some information from the announcement:
"In the third quarter of 2011, IBM intends to offer select IBM System x blades running Linux® on System x in the IBM zEnterprise BladeCenter Extension Model 002.
In the fourth quarter of 2011, IBM intends to offer select IBM System x blades running Microsoft Windows in the IBM zEnterprise BladeCenter Extension Model 002."Here's a link to the announcement: