Cut-the-line pass for the airport?
According to Wired News, the Transportation Safety Administration is trying to work out the bugs in program that would allow passengers that are willing to give the TSA certain information about themselves access to an accelerated line. The important point here (although I wish it wasn't so) is that this is not a program that will allow you to skip security checkpoints altogether, but to get you into a separate (hopefully shorter) pre-registered line.
Many times when I fly Southwest airlines, I change my flight times -- Southwest makes it really easy to do so at no cost, so I take advantage of that. However, every time I change my ticket (especially really close to flight time), I always get flagged for secondary screening. Just for ease of travel, I would certainly be willing to give the TSA information that they were requesting to become a pre-screened traveler (and, as far as I know, I haven't done anything wrong that would make my name be flagged in any criminal databases).
Still theoretical, but encouraging.
From the article:
"The cards likely will include a biometric identifier, such as a fingerprint or iris scan. Participants also will have their backgrounds checked against commercial or government databases. However, the TSA has not yet decided which airports, vendors, databases or identifiers will be involved, Von Walter said."