Saw this on the CBS Sunday morning show Easter Sunday (might be a message in that somewhere )...instantly recognized the aortic valve growing in a lab, but it was a sheep's heart valve. They can grow a human bladder already, how long before our own valves?
http://www.cbsnews.com/stories/2008/03/22/sunday/main3960219.shtml
http://www.cbsnews.com/stories/2008/03/22/sunday/main3960219.shtml