David Letterman: Howard Stern boosts ratings

So did Howard Stern's much-touted appearance benefit David Letterman's ratings last night? You bet -- according to TV By the Numbers, "only a tenth of a ratings point separated 'The Late Show' (3.0) from 'The Tonight Show' (3.1)." That 3.1 is lower than any of Conan O'Brien's "Tonight" premiere week ratings.

Letterman has another powerhouse guest tonight: Julia Roberts, whose appearance was promoted during last night's show. Her chemistry with Dave is legendary, and there will probably be a large tune-in just to see what happens. Conan's main guest is no slouch either -- Eddie Murphy, who rarely appears on late night talk shows.