I've read a few bad-type reviews on this, but that just shows what I know. i think Stay Tuned is one of the funnier movies to roll along in a while. Yeah, it's filled with TV rejects like Ritter, Dawber, and Levy, but they're still kinda funny. The funniest thing are the TV parodies (yes, they're funny, dammit), and the whole parody of the modern entertainment industry. Plus you've got a great Chuck Jones cartoon set right in the middle. Moves along just fast enough to keep your interest, and the characters are just tolerable enough you don't want to turn off on it. As was noted, it grows on you.
Review of Stay Tuned
