I haven't been providing as much content, either here or at my blog, recently due to a variety of reasons (baby, job promotion, travel, computer breaking, etc.). Still, I have recently written three different pieces, two concerning Michigan and one concerning OSU.
The two about Michigan discuss how Michigan's defense plans on agressively stopping teams from adding blocking to the point of attack (i.e. pulling OL). Brown is a very aggressive DC, and his goal is to be more aggressive than the opponent at the POA. Effectively, this looks at how McCray performed during the spring game, both good and bad.
But Harbaugh is used to teams doing this. Teams like Virginia Tech, Michigan State, and others have been aggressively attacking pullers with the best of them. Last year, Michigan couldn't really get enough out of the OL to pull off many of these tricks, but still managed some. In the future, you can expect even more. Here's what is up his sleeve.
Lastly, if you're interested in the rival, I look at OSU's Pivot Follow concept, an iteration on the mesh concept that Seth diagramed a bit recently (I went into a bit more detail).