He was 66. From Yahoo News:
Publicist Roger Neal says Travalena died Sunday at his home in the Encino area after a recurrence of the non-Hodgkin's lymphoma that first surfaced in 2002.
Travalena was known for the sheer volume of celebrities he imitated, leading to the nicknames "The Man of a Thousand Voices" and "Mr. Everybody."
His act included presidents from Kennedy to Obama, musicians from Frank Sinatra to Bruce Springsteen and actors from Marlon Brando to Tom Cruise.
I remember seeing him on TV a lot when I was a kid, and I was reminded of how talented he was when he appeared on Letterman a few years ago:
Here's a clip of him on Merv Griffin. I think I may have been three when this aired:
Rest in peace.