AOL CEO Randy Falco and President Ron Grant — check out the photo and you'll see why the rank and file call them "Smithers and Burns" — kept plans to buy fourth-place social network Bebo secret from AOL's other top execs. Acquisitions talks are often kept quiet, but BoomTown sources say Falco and Grant were more secretive than usual. Can't say we blame them. The exchange — "We're targeting Bebo." "Who?" — has to get old.