Interesting piece by Jason Perlow entitled Microsoft: Let My NT Go! (via Microsoft Watch). Basically a good idea, it's old software that is still used (I was at science world this weekend and one of the crashed computers was a NT4 workstation system). Personally I don't use NT4, and think it looks and feels pretty old... Windows 3.1-ish to be precise.
Of course, Microsoft would never do it. They've put too much energy into discrediting Open Source and the GPL (if they released the source code, for free, they'd never use that evil, cancerous GPL license anyway). My $0.02 anyway.