This is a week old but VoptXP has been finally released, with full support for NTFS and 2000/XP It's a fast and robust defragmenter, the only downside though is the lack of ability to defragment page file and move it to beginning of the drive... http://www.goldenbow.com/ That and their site really needs a new design.
Vopt ME was the best. Vopt XP did not impress me at all. Even in safe mode it left 124 frags and 3367 gaps.