North Dallas Thirty provides this roundup of much vileness from the anti-Bush left about Mary Cheney and Heather Poe's new arrival, mainly from comments on lefty blogs (rather than by the bloggers themselves).
Colorado Patriot makes the point that:
if the Gay Left were as dedicated to forwarding the message that gay and lesbian parents are just as loving and deserving of rights because they're just like any other family, they'd be praising the birth and looking for fans of the Vice President and his family to follow his loving example.
But that would be way too constructive and deviate unacceptably from the one true correct party line.
On the other hand, criticism of the exclusion of Mary and Heather from the widely disseminated grandparents + new baby grandson photo seems to be a valid point.