A side comment: What are politicians to do? Thoughtful, evenhanded analysis simply doesn't drive traffic as effectively as outrageously stated opinions. It's unlikely that political campaigns will even be able to identify the bloggers who can provide them with good thinking, good writing, and comparatively inoffensive archives, since their more strident brethren will be the ones at the top of everyone's blogrolls.
Some of these standards will inevitably change. Too many people are living online now, and that means a paper trail. No one is always at their best. At the same time, I hope it will start to dawn on some of the newcomers that they are publishing, and lead them to moderate accordingly.
A second comment: Hiring these particular bloggers was the equivalent of hiring Molly Ivins to write for your campaign—except without her years of experience, and without the filter of the editors who taught her how to moderate even brash opinions to appeal to the broadest possible audience. You might have loved Molly Ivin's writing, but she was at her best speaking truth to power, not speaking on behalf of the powerful.