Lily Tomlin not lost in the '60s
Comedy legend offers mix of laughs, gravitas BY STEVE KNOPPER ... Lily Tomlin is talking about her middle finger. In 2003 she told a reporter that on "Rowan and Martin's Laugh-In," the TV comedy classic from the late '60s and early '70s, she and her co-stars would subversively dial telephones with the incorrect finger. "We got away with it for a few weeks, because half the fun of doing a show like that is being mis…