NBC's innovative Daily Nightly blog is expanding. "While this has been a blog in its early stages, it's about to take a leap forward in content and become something closer to our goal for the Daily Nightly as a running narrative of our day, while reporting, gathering facts and compiling the broadcast," Brian Williams explains. A promo for the blog aired at the end of Tuesday's Nightly News.

NBC News correspondents and producers will be contributing regularly throughout the day. "Our goal will continue to be a window into our daily editorial process and as much transparency as possible without handing our daily coverage plan to our worthy competitors," he adds.

> Also: This morning Williams blogged a "mea culpa" about gas prices...