I just read an AP story which quotes Jimmy Carter as saying his children and grandchildren are supporting Obama and that he "would not disclose who I am rooting for, but I leave you to make that guess." As far as I know, this is the first indication of Carter's preference between Senators Clinton and Obama, and it's very big news. It's also another example of the younger generation influencing an older generation, which we saw recently with Senator Bob Casey in Pennsylvania.
Here's the link Carter Hints at support for Obama