Have you seen the new Palm ads on television? A Palm-toting woman and man sitting in different trains on adjacent tracks spot each other through the train windows. They sense potential chemistry, but oh no, her train is pulling away. She lifts her Palm V, he does the same, and she beams her phone number over. Happily satisfied with their clever use of technology, they settle back in their chairs. My cynical mind flashed this thought “Did they practice safe beaming? What if she sent him a virus?” Will we have to use PDA condoms one day? And can I resist making a pun about how PDA is also short for “public display of affection”?