Notice how the MSM handled John Edwards? Same thing. They didn't publish anything about the love child until a picture was about to be published in a tabloid.
The Public has a right to know... When it's a Republican - like Palin's child - they run with a rumor. No matter how damaging or unlikely the rumor is... because they can't wait to stick it to a Repuclican.
When it's a dem - we get the "cover" part of coverage. They "cover" for the dems. It's awful.
The press corp clearly doesn't vet dems like Obama, so this has as much to do with creating an accessible, visible, and permanent repository of information on him as it does with "breaking" news. Its a shame that some self-styled "conservatives" don't get that.