Seth Rogen and James Franco in Pineapple ExpressPINEAPPLE EXPRESS

As the happily zonked, pot-dealing Saul in Pineapple Express - written by Superbad screenwriters Seth Rogen (who also stars) and Evan Goldberg - James Franco is wonderfully unpredictable. The actor has flashed the occasional grin in previous film roles, but his uncanny resemblance to James Dean finds him so often used for brooding melancholy, most notably in the Spider-Man films, that his emergence as an inventive and quick-witted comedian in this stoner-buddy action farce is cause for celebration. Or rather, it would be, if Franco had a better movie in which to display his gifts.

Christopher Mintz-Plasse, Jonah Hill, and Michael Cera in SuperbadSUPERBAD

Superbad, the wildly hilarious, subtly moving, and only-a-little-disappointing comedy about two youths hell-bent on securing booze for (and getting laid at) a high school party, is directed by Greg Mottola, but it's impossible to miss the imprint of its producer, Judd Apatow.

Steve Carell, Paul Rudd, Romany Malco, and Seth Rogen in The 40-Year-Old VirginTHE 40-YEAR-OLD VIRGIN

Considering the film's title, this might sound ludicrous. But in The 40-Year-Old Virgin, Steve Carell, playing our hapless hero Andrew, gives what might become a legendary comedic screen performance.

Lindsay Lohan, Amanda Seyfried, Lacey Chabert, and Rachel McAdams in Mean GirlsMEAN GIRLS

Recently, some friends introduced me to the considerable pleasures of Freaks & Geeks on DVD, and I understood why the show barely lasted a season; it was a nearly pitch-perfect rendering of high school's everyday horrors and comic humiliations, and what mass audience, hoping for mindless entertainment, wants to subject themselves to that? And just like that sublime TV series, Mean Girls, the new teen comedy directed by Mark Waters and written by Tina Fey, is so wickedly sharp and achingly funny that its target audience probably won't know what to make of it.(At the screening I attended, everyone laughed like hell at the overt physical comedy, but the movie's most hilarious dialogue fell on deaf ears.)