If you want your roots searched in-depth for free, just be famous! Check out this multi-part article on Barack Obama's family history, including an interactive family tree, plenty of photos, unexpected connections and the like. This link will take you to the introductory article, but be sure to click around the "photo gallery" and "related stories" section. Earlier this year, I traced his Kearney branch to Moneygall, Ireland, but that's just the tip of this genealogical iceberg!