What do you do when you are a billionaire? Swim in the cash in your money bin? Cavort with foreign models? Try to make the Dodgers? I'm not really sure. But I am pretty sure that you buy things that aren't for sale. Like sports arenas. Paul Allen bought the Rose Garden, home of the Portland Trailblazers, again, just for fun. He must have tired of building power plants in Bangladesh, investing in commercial space travel, and dating hot Hollywood actresses. Ho hum.