A butcher block design with a slot for your tablet is pretty common, but this one from Brooklyn Butcher Blocks has a topsy-turvy design that lets you make use of both sides of the cutting block. The iBlocks are made in a variety of different wood types and assembled in such a way that cuts down on the wear and tear that most boards put up with. Nils Wessell of Brooklyn Butcher Blocks describes that "By reorienting the woodgrain vertically, you actually cut between the wood fibers as opposed to across them. This means your knife is cutting through virtually nothing and that your board takes much less abuse."
In addition to being more practical for daily use, the boards can be customized for different types of tablets, depending on the make and model you use most in the kitchen.