The hardcore fans of Aibo, a popular robotic pet, are a creative, if geeky, bunch. Since 1999, when the lifelike toys first appeared beneath Christmas trees, hundreds of Aibo enthusiasts have programmed their charges to perform tricks unimagined in the boardrooms of Sony, the robot's creator. By expertly tweaking Aibo's code, hobbyists have enabled the robobeast to boogie to Madonna's "Vogue," double as a breadbox-sized surveillance camera, or growl "Bite my shiny metal robot ass!" All these behaviors are infinitely… more