Interestingly enough, when I ordered mine, I got a $25 discount, for no particular reason I can discern. Brought the total cost to $256, delivered. We'll see how it measures up.
You can install the market easily; my understanding is there isn't the logic in the market (yet?) to handle a wider range of devices, (without 3g, gps, etc.). With android market advertised for google tv advertised for the spring, I'm wondering if they're prepping the market for a much wider range of devices...