Reader probably doesn't support the new features anyway, so just for the sake of completeness:
Version 1.6 (Word 2000):
http://latex2rtf.sourceforge.net/rtfspec.html and
http://support.microsoft.com/kb/269575/EN-US/
Version 1.7 (Word 2002):
http://support.microsoft.com/kb/269575/EN-US/
Version 1.8 (Word 2003):
http://go.microsoft.com/?linkid=5506909