Schrodinger's BallBy: Adam Felber Tender, hilarious, and packed with delightful surprises . . . If Einstein and John Cleese had written a novel together, this would be it. Joseph Weisberg, author of 10th Grade Four friends set out into the night in Cambridge, Massachusetts, undeterred by the fact that one of them might actually be dead. Deb has perfected the half hour orgasm. Grant, a geek, desperately desires Deb. Depressed Arlene has just improbably slept with