The Whitney Biennial, which is coming up Mar. 2-May 28, 2006, always confuses me. When I first started going as a kid, the Biennial was about just trying to figure out what that zany art world was up to. Back then it was supposed to fill you in on what you had missed over the past year or two. These days, however, the art scene is so damn big that some degree of curatorial prerogative is expected.