According to a cnet news article that came out yesterday (and a Nielsen Mobile survey that also came out yesterday), Americans send more text messages than make phone calls.
"For the second quarter of 2008, U.S. mobile subscribers sent and received on average 357 text messages per month, compared with making and receiving 204 phone calls a month, according to Nielsen," says the article. That's increased 450% since 2006.
I have to admit, I think I probably text more than talk on the phone. Sometimes it's absurd to send 15 texts back and forth when trying to make dinner plans or something...but for the quick "I'm going to the grocery store, want anything?" message, it's so easy.
Plus you avoid all that awkward voice on voice communication....(kidding)