Not me! Within our very own company we have someone that blogs regularly about help files and formats. If you write or integrate content with Dynamics AX help, this could be a handy resource.
You can find his blog at http://blogs.msdn.com/b/thehelpguy/. In particular, the Help Guy's latest post about the current state of the various Microsoft help systems and formats is very interesting: http://blogs.msdn.com/b/thehelpguy/archive/2010/10/26/help-state-of-the-union-october-2010.aspx.