I have not seen an firm pricing but they look to be between the pricing of the current LGA 1156 and LGA 1366 boards, with the higher end boards around $300 and lower end boards in the mid $100's (my best estimate on what I've seen). I wouldn't expect the initial release of the H67 boards to be below $125.
I could be wrong on the pricing structure but it fits the best model in the "current" available platforms. It still gives the LGA 1156 a little live at the lower end and the higher end LGA 1366's have a place. Now of course once the LGA 2011's are released, the pricing structure should change to reflect more of the current pricing structure of the LGA 1156 and LGA 1366 (again my best estimates