I thought a register of Business Direct Mail users and what stamps they use might be helpful. so:
April 2011 Royal Mail Royal Wedding - 1st class SA coil 2009 - MRIL MAIL
July 2011 Sunday Times Wine Club - 2nd class SA coil 2010 - MRIL MA10
?? 2011 Taylor's Port - 2nd class Business sheet 2010 - MBIL MA10
---- 2011 One of the credit card companies (agents) sends out new cards using coil stamps but so far seem to be stuck with 2009.
March 2012 update: The British Heart Foundation also uses 2nd class coil stamps, this is the 2009 self-adhesive:
Let us know of any additions to this list, by email or using the comments box; either way I'll add them to the list.