Hi Lab,
I am Jean, i totally have the same situation as ur case.
I applied PR of family sponsored inland in July 2011,
and i did update the inland situation form asked by CIC in 2011, got extended visitor visa in 2011 too.
Later i did medical examination in dec 2011.
Then i expect to get AIP. Nothing get, but the letter to ask additional info in the end of May 2012. I sent it right way, and was received by CIC on 6th June, 2012.
Now almost 4 month, i also get nothing updated by CIC.
I also called the cic call center, exact same frustrating answers from there.
Please keep me in update with ur case, and what i could do next expect to wait?
Thx a lot,
Jean