Twice a year, the organization representing the wireless industry puts out a bunch of facts and figures on how much we're using our phones in the U.S., and each time, I can't help but marvel at the results. The big number this time around, according to the CTIA: In the past six months alone, Americans sent an estimated 740 billion text messages, which comes out to about 4.1 billion messages each day. Put another way: That's 11.7 text messages a day for every man, woman, and child in the country. (Of course, the average American teen can fire off 11...