Right now, any US citizen can apply for the new "Passport Card," a 'smart card' photo ID with your passport information on it.
http://travel.state.gov/passport/ppt...card_3926.html
I picked up one when I had to renew my regular passport. Driver's license size with photo and signature, but with an embedded micro-chip.
With the implementation of the Patriot Act, a passport or birth certificate is often required now to cross back into the US from Canada or Mexico. In the past, all that was needed was a driver's license or birth certificate. The new "Passport Card" removes all crossing problems without the need to carry a full sized passport.
On a less-than-funny note, when trying to write a check in a store, the clerk wouldn't accept my regular passport (extra sets of pages added because of so much travel) as valid ID, insisting instead on seeing a credit card with no photo at all!
Most Americans are NOT aware of the move afoot to implement border checks from state to state. This is being kept VERY quiet as it meanders through the halls of democratic abuses, but the first balloting on the issue has already been held. It was sent back down for re-working. I'm guessing (and ONLY guessing that it will become law withing the next 5-10 years, with the new passport cards being required to move from state to state. After all... national security is at risk... People will NOT be required to apply for them. (That would be too much like a totalitarian regime.) But they will not be able to travel from one state to another without them...
"They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety." Ben Franklin
To be honest... I never run with scissors.
Stitchawl