Personally, I haven't really gotten that much into it, but since the Darkmoon Faire was in Chicago this past weekend, I went out there and obtained some photos and an interview or two for those interested to peruse. I learned to play the game and got to go one-on-one with one of the creators (his interview will be up today), and I have to say that the game itself is pretty fun-- lots of strategy, and plenty of inside jokes about our own little world of Azeroth.
I don't see it taking over my life, however, mostly because I don't have anyone around to play with-- even my boardgaming and roleplaying friends haven't picked it up yet, and probably won't any time soon. But I can definitely see the draw, not only of learning all the strategies of different decks, but actually collecting the cards that make them up.
So is it your thing or not? And why? If not, have you tried it and not liked it or just not tried it at all?