This article says pretty much what I've been thinking about Palin's daughter.
One, it's pretty awful for an unmarried teenager to be pregnant and have everyone in the world know it. I hear Jamie Lynn Spears sent her a baby present, which is kind of cool considering how she was roasted in the media.
Two, it's a great opportunity for parents to talk to their kids, and not just their daughters. Boys need to be educated and reminded of potential consequences as well.
Finally, it reminds me of a friend of a friend of mine who has four teen and pre-teen daughters. She is an amazingly empowering mother for her girls. She tells them all the time that the decision to have sex is theirs, and to keep it that way. She doesn't puSSyfoot around with "if you have sex before marriage"; she's all, "let's face it, you're probably gonna, so here's what you need to know and here's my doctor's phone number." Her husband leaves the room when she gets started, haha. On the other hand her daughters are great people.