Welcome to the board Jyhawk, you can find several of the threads you're looking for by using the search function. For next season, I'm sure others can give a better breakdown than I, but the long and short of it is the following:
1. Defense: has the potential to be great if they can keep improving like they did at the end of last season. The second half of the season defensively was completely different than the first half of the season. Will Randy Gregory take that next step towards the "Suh" level? We'll have to wait and see, but god I hope so!
2. Offense: Questions on the line and obviously the QB position. Can Armstrong take that step to the next level and be the clear #1 QB? Or do we have a QB controversy on our hands? Receivers should do very well and our RB situation is great! Abdullah is a stud and with Cross and Newby back there as well I'm not worried about our RB situation at all. Just hope the O-line has everything squared away.
3. Special Teams: Biggest question mark on our team right now. They weren't very good last season and with what I seen from our kicker in the spring game, I'm worried to say the least.
That's a real down and dirty version of what I think we're looking at for next season. Several other posters have a better handle of what we're looking at at each position for next season. Again, welcome to the board, enjoy your stay here, if you have any questions don't hesitate to ask!