Apparently, the source code for NT and Win2K has been released and is circulating. There is a post on Neowin.net about this:
http://www.neowin.net
So, if this is true, what could it really mean? The worse case scenario that I can think of is people getting the source, examinging it, and finding new problems that have not been found before. Making viruses/worms that exploit these newly found problems.
Total havoc, chaos, and the destruction of the Internet as we know it!!!!