That's not necessarily true... Win2k had huge support when it was in beta. Infact, 90% of what i know about Win2k was learned during the beta period, from sites such as
www.ntfaq.com (which has some support for XP, not much though).
Actually, there's books for Windows XP already out... but not too many reviews of them as it's still relatively new, so i'm a bit reluctant to get any of them (even amazon.com don't have user reviews of these yet).
I was just looking for some detailed information on certain things... such as exactly how does the system restoration worked, or networking.