http://www.matrox.com/video/en/products/mxo2/features/

Nice piece of equipment.
I asked Blackmagic the same at NAB.
A simple I/O box with HD-SDI through the Express slot of a Macbook Pro. But they don't have it.

Is it out yet? Pricing yet?

I think that they accept pre-orders and the price is set around $1500.00 which is really nice.