MGoBlog (Brian and Seth) and a few other people were at the preseason Michigan alumni event in Chicago tonight. They had presentations about the team as a whole as well as about why Don Brown is such a great DC (ie. he knows how to effectively use hybrid players that don't have a traditional position to their combination of size/speed/agility/athleticism).
It basically reinforced the common beliefs. Speight is the QB and should be better. The RBs are solid and will split snaps based on their different strengths, but Evans is the top guy. WRs and TEs are relatively unproven, but there's a lot of potential and depth so they should improve as the season goes on. OL is average overall, most likely, but should improve through the season. The DL still has great starters but depth isn't there yet. LBs are at least good and potentially great. Safeties are relatively inexperienced but played well last year when they had to so it should be solid. CBs are a big unknown, but there's a lot of competition. Kicker and punter are highly rated but obviously unproven. Return game probably won't be as good without Peppers, but blocking punts/kicks could still be a big advantage.