DCA still has some of the shortest wait times for security, although as previously stated Terminal A can take the longest. Definitly heed what thezipper has said about the puffer, I really can't stand the thing, especially when TSA makes little kids who are frightened out of the mind walk through without their parents. Makes me angry every time.

As for Silver upgrades out of DCA, it has become really hit or miss for me in 2006. Morning tends to be one of the harder times to score an upgrade, as is early evening, but there is always a chance. The DTW flights in late morning or early afternoon have been the best for me out of DCA in 2006.