Bruno, you asked if it bills your card immediately: it doesn't appear to.

It's going to be tough waiting a couple months for this thing. Fortunately, supposedly if you preorder you get it a little early. We'll see though. I've ordered two highly-sought gadgets this year (the Fitbit and the Square credit card reader). They both took almost five months to get to me (I just got the Square reader this morning!). I don't expect Boxee to take that long, since they're partnering with a real hardware vendor, but I'd be surprised if everything went smoothly with the launch...