In the old days of personal technology, you knew a topic had arrived when it got its own magazine–be it PC Magazine or Computer Gaming World. Tech magazines–at least ones printed on dead trees here in the U.S.–are very nearly extinct now. But a startup is going to try a 2011 version of the idea: it’s launching a magazine about tablets…that’ll be distributed exclusively in digital form on the iPad. TabTimes’ editorial staff includes a couple of grizzled veterans who are friends of mine, Editor George Jones (formerly of Maximum PC and GamePro) and News Editor David Needle (ex-InternetNews.com and InfoWorld). The publication debuts this fall, but they’re already tweeting.