Ralph Vacchiano's Blue Screen blog ranks the Giants receivers on the depth chart. It's speculation at this point, but it's the best list I've seen.
He agrees with us that Steve Smith is the surest bet to be a significant part of the offense due to his rapport with Eli Manning. The most interesting player on the list might be No. 3, Mario Manningham, who has shown flashes of game-breaking ability and could wind up starting at some point.