An excerpt-from Wonkette.com--the best analysis of the whole Rick Warren debacle I've read yet.
In case you don't read political blogs as obsessively as I do, Obama has chosen Rick Warren of Saddleback Church fame to give the invocation at the inauguration.
Rick Warren wrote the Purpose-Driven Life. And while he seems less fundie-crazy, than say, Jerry Fallwell or James Dobson, he is on the record saying that gay marriage is equivalent to pedophilia, or rape, or bestiality. He was extremely vocal/active on the whole Prop 8 mess, which is still an open wound for a lot of people. In short, he is an asshole. An asshole whom Obama chose to give perhaps the greatest honor that can be given an American minister.
From Wonkette
http://wonkette.com/405071/obama-on-rick-warren-uhh-hope#more-405071----
But it was a dick move by Obama, mostly because of all the very recent publicity Warren has received for helping out-of-state Mormons amend the California state constitution to dissolve civil marriages between consenting same-sex adults who live together in private. This was an evil thing, Prop 8, evil and immoral and incredibly hurtful to a lot of people. And when Obama brings in someone so attached to this current ugliness as Warren to give a speech at his Presidential Ceremony, that’s an unusually cruel and timely reminder to the gay community that the Democratic Party will not push for their “equal rights;” for Obama to claim otherwise at this press conference is a lie.