bmartin1206- My husband and I just traveled across country with our infant son. I have to say, we had a great experience overall with the new security! It was way more efficient than it used to be (we traveled through LAX, Dallas and Atlanta Hartfield), and the employees were all really friendly. The only minor snag was with our son's carseat. We had purchased a seat for him on the plane and were traveling with his carseat. It didn't fit into any of the x-ray machines and had to be handchecked. This was only a problem in that the TSA employees kept insisting on trying to jam it into the machine. At one point it actually got stuck! On our last run through security on our flight home, I finally just told them up front it wouldn't fit and would need to be handchecked. After attempting to put it through several times, they did finally hand check it.
All in all it was no problem, but something parents traveling with large strollers or carseats may want to be prepared for!