By Walt Hickey Trans-Siberian Orchestra The hottest holiday ticket for the past several years has been the Trans-Siberian Orchestra tour, which runs a few weeks of the year in the lead-up to the holidays and has banked hundreds of millions. To date, the act has grossed $683.2 million on the road since kicking off a tour in 1999. That year, the act played just seven shows in five cities and drew an audience of 12,000, but it’s snowballed into a juggernaut, and over the subsequent run it’s moved