So I joined the Keurig club a few weeks ago, and I am enjoying the convenience and the quality of the coffee. I also use the re-usable k-cup thing with some grounds, and it seems to work nicely for me so far.
I thought I'd share a few findings about buying the k-cups in Calgary and online that I have learned in talking to some friends who are quite into these things.
Singlecup.ca seems to be selling the k-cups online again (edit: which Ashartus apparently informed everyone about 3 weeks ago!

), with free shipping on orders over $59. I found this out by accident as I was visiting a place called The Coffee Connection in the NE and some of their literature suggested that they were affiliated. That may be an option for those of you that would like to order online. If you're able to go to The Coffee Connection in person, you can mix and match 24 k-cups for $16.75 (about 0.70 each), which is a neat way to try some of the different varieties before ordering a whole box.
Surprisingly, a good place to order a good variety of k-cups is staples.ca. Right now until January 10th you can save 10%, so a box of 18 will cost $11.48 (about 0.64 each), but I ordered some before Christmas at 20% off, so it was closer to 0.55 each. Staples has free delivery on orders over $50 as well. The selection seems quite extensive, but a few were out of stock when I made a previous order.
Obviously, using your own grounds is the most economical way to brew a cup, but I like to have a couple of boxes of the k-cups in the cupboard for the added convenience. My alternative is Tim Hortons each morning, so even paying for the k-cups is still cheaper and quicker. And the added bonus is that at work, the company is paying for the k-cups now as well so I can just defer my morning cup until I get to work.