I always thought that having Sharepoint and CRM on a mobile device would be very powerful!  I ran across this post from Sharepoint 2007 (http://blogs.msdn.com/jasonlan/archive/2006/07/31/681518.aspx).  Funny it reminds me of an Open Source project that I was watching around Sharepoint on a Blackberry(http://www.sourceforge.org/projects/bpc).