Our quick pick:
"West" -- Minnesota, Wisconsin, Iowa, Nebraska, Illinois, Northwestern.
"East" -- Penn State, Ohio State, Michigan, Michigan State, Purdue, Indiana.
Reasons: It maintains strong existing rivalries within divisions; it creates a decent balance of power, though the east would certainly be a higher-profile division; and it just seems plain logical to split that way.
Fellow Twitterererer, former colleague and professional contrarian Jeff Shelman prefers a north/south split. He is of the belief there is no way Michigan, Ohio State and Penn State wind up together. We're not so sure. In the end, of course, a ninth conference game -- which would logically mean one game against every team in your division, plus games against four of the six in the other division -- would take some of the bite out of the separation anyway.
Nevertheless, this subject seems to stir some passionate debate, so we'll throw it out there: how would you divide up the Big Ten into football divisions?
One thing about which we can all agree: a nice cabernet or chardonnay certainly goes nice on your table.