Ad Age: Letterman’s Late Night Ad Revenue $271 Million; Chelsea Lately’s Nearly Equals The Colbert Report’s - TV Ratings, Nielsen Ratings, Television Show Ratings | TVbytheNumbers.com

How much ad money do the late-night hosts bring in?

Interesting (and kinda surprising) points: (1) Letterman's show made more money than Tonight even when Tonight was #1 in the ratings; (2) Colbert's revenues took a tumble last year; (3) Chelsea Lately is the only show that improved in 2009!