Hello everyone!
  Praise the Lord! My husband recieved his PPR request today.  Our timeline is as follows:
ISLB received application: Oct 10, 2009
May 2010: ISL requested additional proof of relationship, updated PCC 
July 2010: ISL requested remedical
Feb 2011: ISL requested updated PCC, Supplementary forms, IMM forms, Permenant resident forms
March 18, 2011: PPR request
Thank you all for providing support and understanding, it really helped us get through our process!  
Timeline

For Husband) 
Oct 10, 2009 -CHC-I receives app(Received AOR) 
May 2010 -CHC-I request more info, updated PCC 
July 21,2010 -remed done 
Feb 5, 2011 - request for imm, supp forms and new ppc  
March 18, 2011: PPR request