How long does it take for a smartphone to go from two hundred bucks on contract all the way down to a big, fat goose egg? If you're Bell -- and the phone is the Palm Pre -- the answer is right around five months, apparently. Following its August release and a couple of mid-course pricing corrections, Bell's now making Palm's first webOS-based device available for free just as long as you're willing to commit to three years at a minimum spend of