I think with the value of QBs these days several teams need a QB, and there value isnt there early in the draft but could move up to get ahead of there competition to grab a QB later in the first. Cele, Buff, Jacksonville, and Oakland all have a stake in getting a upgrade at QB. I also think Arizona could grab one even with Palmer there. With the 20th pick there is a chance a player with a greater value could slide and someone with extra picks, Miami, SF, or Balt could want them bad enough to move up.