It looks like IDW is rolling with a few special edition Comifolios. Included in these, you will find a limited-edition lithograph, a die-cut hardcover portfolio, and the Twilight Sparkle or Rainbow Dash comics depending on which one you buy. They are only going to be printing 500 of each, so I guess if you are one of those collectors who has to have them all, you might want to pick them up.
Have some links:
Rainbow Dash
Twilight Sparkle
They tossed videos showing off both of them on Youtube too. Find those below the break!