Didn't they open conference last year at home against penn state ?
Yup. Or, at least PSU opened at Nebraska. I don't think Nebraska had any Big 10 matches before that one.
As I understand it, the conference schedule should be a mirror image of last year's conference schedule.
If you played teams X and Y at home in week N in 2011, you play them on the road in week N this year. Similarly, if you played them on the road in 2011 in any given week, you play them at home that same week this year.
Exceptions due to teams playing on Sunday versus Saturday will occur, but it should still be the same order, and the same week of play.