I contacted my MP's office by email last July. I had to write again after a few weeks because I hadn't heard anything. After a week or so they told me that my case probably wouldn't be decided until next year. I wasn't too happy with that answer so I wrote to the embassy to ask if I could get a temporary visa for my wife...I explained that we had been together for years outside the country and other reasons why our case should be straightforward. I received a form email from the embassy 'Dear Sir or Madam' Please look at our website...it seemed they hadn't even bothered to read the email. But they had read it...a couple of weeks later they asked for my wife's passport and new medicals. She now has her visa.
So I guess it helped, I might not have written to the embassy if I hadn't learned from the MP that it was going to take so much longer....
We sent our app to CIC: Mid Oct 2008
Processing in Bogota: End of Nov, 2008
Visa rec'd: Early Nov, 2009