At Sears, mall stores, usually people wait outside whichever door is closest to the department they will be shopping in first. So there are lines at every door. I know at my mall, you can wait in the mall usually; but for all the other doors, yea, you have to stand in the cold.
The open at 5 this year. Also the Reward Cards are being given out at package pickup I believe everywhere because it was advertised in the paper that way.
All doorbusters are while quantities last, no subs and no rainchecks. Some larger items like TVs can be ordered once they run out in the store as take with items.