My personal Tom Poston anecdote: I was defending a deposition in Los Angeles, and the opposing attorney sent the young associate helping her out of the room to fetch some documents. She turned to me, and said conspiratorially: "We just hired him. He's Tom Poston's son. Doesn't he look just like his dad?" And, yeah, he sort of did. The case settled not much later, and I never saw him again. Google answers that question with a one-week-old LA Times story that interviews him for a "trend" story about contract attorneys.
(Update: Adam Bonin reminds us that Poston was the voice of the Capital City Goofball. The Simpsons Curse continues!)