Linux

This looks promising and doesn't use the 'captive' trick of using the ntfs.sys at all. I wouldn't trust it with non-backed-up data just yet, but I like being able to move data back and forth without doing VM tricks and network shares.

http://sourceforge.net/mailarchive/forum.php?thread_id=23836054&forum_id=2697

Other people seem to be hopping on the bandwagon as well:
http://zakame.spunge.org/blog/2006/08/11/ntfs-3g-love/

It looks like the latest revision is dated 08-11-2006 so far.
http://mlf.linux.rulez.org/mlf/ezaz/ntfs-3g-download.html