I've been helping out my old colleagues on the identity team these past few weeks (so that people could take a well-deserved summer vacation, and I haven't had a bit of spare time.  I have newfound respect for the work of Anaïs Nin. 

Good news -- our seniormost engineer on the ADSI team, Max Vaughn, has started a blog to get out technical information as quickly as possible.  View his first blog post here:   http://blogs.msdn.com/maxv/archive/2008/09/12/creating-a-new-userprincipal-or-groupprincipal-for-existing-object-when-saved-causes-object-to-be-deleted.aspx.