They have already released 4 service packs to date for Windows 2000 and they
will probably issue a fifth one before the end of its life cycle, but I wouldn't
count on them investing the same amount of resources as they did with Windows XP
SP2.
The mainstream support for Windows 2000 ends on 30-Jun-2005.
Product Lifecycle Dates - Windows Product Family
http://support.microsoft.com/default.aspx?scid=fh;en-us;lifewin
Just my opinion.