Climb your family tree for free through October 15th. It’s a periodic FREE offer from Ancestry.com, to help you trace your family roots and links. This one celebrates the 15th Anniversary of Ancestry.com. Also, there’s a sweepstakes to win a grand prize of a trip to California to go behind the scenes of NBC’s Who Do You Think You Are? with producer Lisa Kudrow. During a similar free offer recently, I found my grandparents — including their names on the ship’s list of passengers — and some other immigration and citizenship documents for other members of my family tree. Very cool. The free search offer is good through Saturday, October 15, 2011.