If you can sign an electronic pad at the supermarket to pay your credit card bill, why can't you sign the touch-screen of your iPhone to sign a political petition? That question is now being put to the test by the Citizen Power Campaign in California, working with technology developed by a company called Verafirma. The ballot initiative they're working on aims to strip public employee unions of their ability to tap member dues for political activities (a proposal that may not be constitutional) but leave the politics aside; the potential to open a new front in ballot petitioning is what's important. As far as anyone knows, this is the first time in the U.S. that ballot initiative signatures are being...