No worries, I wondered the same thing before.
It is still called "Landing" when you go for the final interview after you get your DM, and when basically the whole process is done (except for waiting for the actual PR card in the mail)....to my understanding.
There are different offices for landing, you will be sent to the one closest to you. There is Etobicoke, Scarborough, Edmonton, Vancouver, Montreal that I know of...sure there are tonnes more....
The interview is basically 3 questions that they ask the applicant I believe - have you ever committed a crime - do you have a dependent child (not one together) - have you ever been refused admission to Canada. If you haven't paid the full immigration fees, you pay it then, or I think you may have to bring your receipt?
I am also in the process of trying to clear some of this up, as I didn't pay as close attention to this portion of the process when we were just dying to get AIP and OWP....and wasn't expecting DM yet, so I am trying to find some more info on it as well.
Anyone who has recently been thru this process or who is more familiar with it: Feel free to chime in !!!