This week almost everyone I know is setting up their holiday trees, and with the usual ornaments, too. Think glass colored balls, Santa figurines, and various snowflake-type embellishments. I say, use your tree to let your geek flag fly! Instead of the usual holiday tinsel, throw something up that displays your love of tech, video games, and sci-fi. I mean, aren't these Mario and Luigi ornaments too adorable for words?