It's Louis Ferreira, who was in Stargate Universe most recently.
Actor Fred Willard
Jermaine Paul who was also the winner of 2011's The Voice
Mark Harmon
In 2010, John Slattery, or the guy who plays Roger Sterling in Mad Men, did the voice-overs for Cadillac commercials. However, as of 2011, Laurence Fishburn, or Morpheus from The Matrix franchise, does the voice-overs for Cadillac commercials. It sounds like Richard Thomas who used to be "John-boy" on The Waltons, but that's strictly a guess. No, Richard Thomas is doing Mercedes commercials. Richard Chamberlien (spelling?) of Dr Kildare fame was the last voice I heard on a Cadillac commcercial. It's actually Chris Lemmon, son of Jack Lemmon.
The Voice Over for Cisco commercials (2008-2011) was Anabel Winitsky, from Los Angeles, California.
Tuesday 8th February 2011: Apologies if I'm not typing my answer in the correct format, this is my first time answering a question. I do have a definitive answer: it's just a voice-over artist. You can read about him at the link I posted.
The 2011 Mazda Mazdaspeed3 has 16 valves.
The 2011 Mazda MAZDA2 has 16 valves.
The 2011 Mazda MAZDA3 has 16 valves.
The 2011 Mazda MAZDA6 has 16 valves.
The 2011 Mazda MAZDA6 is a gas-powered vehicle.
The 2011 Mazda MAZDA3 has a 5-speed manual.