hi bem and medik! Like both of you I'm also a March 2010 applicant and have received my MR Sept,2011. My PPR came by email last Feb,2012 and now I'm waiting for mr. postman to arrive with our visa. It took us(me my husband and 3kids) weeks before we finished our medical. My husband needed a repeat chest x-ray and prostate exam. He was required to come back for several days for these procedures. Could you imagine the anxiety my husband went through out of fear for that digital exam and the waiting period for the results. Fortunately all went well. We were relieved to know that we are all healthy. By the second week of October 2011,the NHS sent our results to CEM. On Dec 2011, my in process details has added another line: medical results received (this line doesn't appear to everyone,but I felt excited having read it because I felt that our application has moved and something positive happened). We have waited more than 4 months for that PPR to arrive, you have been waiting a little bit longer but I'm sure that both your PPRs will arrive very soon. Frequent prayers with faith and optimism always work wonders.
By the way have you checked your emails for possible blockers?
I'll be praying with you..