Here's my beef... You can be an Captain on a 50 seat regional jet at 1500 hours, but you can't fly a King Air or Learjet at most places with less than 2000 hours.
I understand the market forces and its great that TSA guys get to move up quickly, but at what point is there a safety concern with crews? 1000 hour captains? I think it'd be an interesting safety study to examine the habits of the 1500 hour captain compared to the 4000 hour captain. History does say that, to a point, complacency is more dangerous than newbness.
Edit: Also, there is a big difference from having the mins set low and actually employing people at those mins. TSA is probably one of the first to realistically use guys at that level.