Wow, Dan, and I thought I was overly verbose : D
love the article though!
a couple things to add-
--if you can, have some beginner decks ready to go. The Stimhack lists are great, but there are plenty others out there too. A fair number of people milling around good comic/game shops are there on leisure time; they might be ready to sit down and play a game if you're up for it.
--this might sound weird, but please trust me on this: if you have any ladies in your playgroup, consider asking one of them to be the reach-out person if other nerd/gamer ladies stop by or seem interested. You might be a really cool/fun/not-weird dude, but trust me when I say that most women will have their guard up in nerd spaces; it is really common for them to have to deal with weird/aggressive/gross behavior from dudes in gaming spaces, and if you have a female player (who is willing!) to give this speil, you stand a way better chance of catching the interest of 50% of the gaming population.
--when comparing to magic, don't be afraid to draw more negative comparisons; many patrons of these places are recovering magicaholics, and will be extra wary of the CCG trap. Assure them, but take care not to estrange yourself from people who still have some love for The Great Enemy in their black and twisted hearts.