(Hummm, neat idea, but uncertain on photos wrapping around the corner. The frames could meet up on the edge, but think the frames still might be best if they met in the corner but that each wall had its own photo frame.
If you've got excess kitchen decor space, this would be a great way to rustically fill that space. u can make is as rustic as you want w/no pretty cut corners. DIY Reclaimed pallet Wood Kitchen Sign [EAT] I'd like this for My far kitchen wall