As many on here keep pointing out, they do not have time to develop Mallett. They were not trying to do what was best for Miami but instead they tried to do what was best for them. They needed an immediate fix, because in all likelihood they will not be around long enough to see Mallett develop. Many are confortable with this, i find it sickening.
As for Orton, they did negotiate for as long as they could, until Denver pulled Orton off the trading block. Incidentally, this happened around the time team practices began. That was not a coincidence.
Again, Ireland admitted to trying to trade back into the second or third round, and its widely reported that Miami was trying to trade for Orton with a third or fourth round pick. That high of draft picks are not used on backups, period.
As far as Irelands reputation is concerned, all is forgiven if we win. In order to win you have to land a franchise quarterback. If it came between going back on his word(which he wouldnt really have, as he didnt commit to Henne until after the draft) and securing the quarterback position for the next 15 years(and probably keeping his job), which do you think he would have chosen?