As predicted, the WoW Minis game from Upper Deck has launched -- starter packs and booster sets are now available at a collectible store near you. I got to play the game with one of its designers at BlizzCon, and I actually found it a lot of fun -- it's very much like a turn-based Arena match, though there are fewer abilities to choose from, and if your characters are killed, they actually come back, as the victory is points-based, not just a deathmatch. But it's very similar to Arena matches in that you spend points on abilities, terrain can help or hurt, and each class has its own counters and tactics.
I found it to be a lot of fun, and probably would get involved in it if I had a friend I could also sucker into it, but no dice so far. Plus, it's two hobbies in one -- not only do you get a fun strategy game (that's surprisingly versatile -- you can play with more than two players if you like, and your victory points requirements are based on your characters, not the opposing sides', so you can play with whatever characters you like), but you also get to collect some cool minature reproductions of some of Warcraft's most famous faces. Good deal. Have you checked the game out yet, or is it something you're interested in?