Taxing text messages? Some Vallejo voters are saying OMG. The North Bay city, with its ever-shrinking revenue stream, is asking voters Tuesday to expand its utility tax to include text messages, private phone networks, pagers and voice-over-Internet services. It's an idea that's spreading around California, as more than 40 cities have similarly expanded their utility taxes at the ballot box as a way to raise money. "We don't use our cell phones a lot, but we think this gives the city a blank check," said retired Mare Island shipyard worker John Kocourek of Vallejo, who's been working against the measure....