A. Windows 2002 is—perhaps—the final name for the Windows 2000 follow-on server line of OSs. The beta name for this server line is Whistler. In places, even the follow-on desktop line (Windows XP Home and Professional Editions) features the Windows 2002 name in build 2465 forward. See the Microsoft press release for more details.
However, at his WinInfo site, Paul Thurrott reports that Windows 2002 might not be the OS's name after all. See http://www.wininformant.com/Articles/Index.cfm?ArticleID=20986 for the full story.