This doesn't make any sense. Windows XP has fewer network (and basically other) features then Win2000, so it would be downgrade to make server based on XP platform (which uses simplified NT kernel) instead of original W2K.
W2K had promising start but still not very popular in networking environment, it doesn't have all the reasons to upgrade from NT4/6sp so few businesses go for it (and that was the goal of W2K development). Just needs time, ~2yrs

Cheerio