Pulling victory from the jaws of impending thundershowers, Sacramento's weather and geography cooperated Saturday afternoon to produce a nearly-flawless "prologue" of the Amgen Tour of California. It was nearly as cold and windy as Sacramento gets, but the rain held off until the last riders were crossing the finish line around 3:30 p.m. Saturday. The clear weather continued into the evening as the out-of-town crowds estimated to be more than 50,000 partied into the night and the Grid's monthly Second Saturday events. Though the race began in earnest Sunday, with 136 racers riding through gusts of wind and significant rain - and Sunday morning was marred by the early-hours theft of Lance