My girlfriend got her copy already (whereas mine wasn't even shipped; I really don't get Amazon sometimes).
I really enjoy the game so far, but the online multiplayer is borderline unplayable in its current state. Once any player has a bad internet connection, the game immediately slows down to a fraction of the speed. When it works well, it's a lot of fun, but so far, it often times doesn't.
Also I'm a bit angry, because Amazon didn't include the stylus, which was supposed to be a preorder bonus over here, in the order. Hope they will hand out coupon codes or something like that, but so far, no word on the stylus.
EDIT:
Finally had a few multiplayer rounds that were actually good and fun. So, so much fun! First of all, I learned that a player can steal another player's key. Wanna know how I found out? By having another player steal both my key and my victory, lol. I was kinda pissed. Also turns out that you can pick up and throw players in VS multiplayer, but I don't know how to do it. I've already tried all logical buttons, but somehow only the other players were able to do it to me, I couldn't pull it off.
Secondly, I have the best VS game ever.
Part 1
Part 2
Twitter unfortunately messes up the quality, and of course it isn't the entire level, but basically, we had a level that required killing a Goomba for the goal to appear, and doing so required steering the Goomba through an obstacle course for a Thwomp to crush it. At first, Mario and me just ran off to the goal, trying to get there first, hoping that Toadette would take care of the Goomba. She wasn't able to do it, though, so we actually ran back. However, we just hindered one another, so eventually Toadette just gave and started bumping to the beat, and I eventually joined her and just let Mario do his thing.
Feel free to visit my website/blog - it's updated rarely, but it looks pretty cool!