Tina Fey and Amy Poehler in Baby MamaBABY MAMA

Despite its sunny, friendly veneer, there's a rather scrappy little war being waged within writer/director Michael McCullers' Baby Mama - one between a lighthearted, pleasant sitcom and a sharper, smarter, more cynical sitcom. (Two and a Half Men versus 30 Rock, as it were.) The former wins, and we could have predicted as much, but the best parts of this engaging buddy flick suggest the truly sparkling comedy it might have been, if only it weren't so eager to be ... well, lighthearted and pleasant.

Heath Ledger and Jake Gyllenhaal in Brokeback MountainBROKEBACK MOUNTAIN

In Ang Lee's agonizingly fine romantic western Brokeback Mountain, two taciturn young men - Ennis del Mar (Heath Ledger) and Jack Twist (Jake Gyllenhaal) - are hired, in the summer of 1963, to tend flocks of sheep on a Wyoming expanse. During the early days of their tenure, the men barely speak. Yet as the months pass, they form a solid friendship, and on one particularly cold night atop the mountain, Ennis and Jack share a bottle of whiskey and a sleeping bag, and - experiencing wordless, nearly aggressive desire - have sex. Despite the inevitability of the encounter, the sheer, naked hunger of the scene is startling, but a greater surprise comes some 20 minutes (and four years of screen time) later, in a scene so powerfully, emotionally true that - like much of Lee's transcendently moving work - it hits like a slap in the face.