Well, this Valleywag piece (in turn based on a NYT article) was saying that video bloggers could learn from the porn biz - but the two comments they highlight could be be more generically applied to PR:
We use good-quality lighting and very good sound," said David Joseph, president of Red Light District, a production company in Los Angeles that has made films like "Obscene Behavior."
ie high production values are seen as a differentiator - all those PR 2.0 types armed with a mike and a copy of Garageband ought to bear this mind when recording their next rivetting podcast
There's not a whole lot of story -- it's basically right to the sex, but we're consistent with the quality," he said, noting that the company is also careful to pick interesting backdrops. "We use different locations, rooms and couches."
Of the hundreds of press releases that land in journalists in-boxes daily, how many get "right to the sex? Or provide a suitably interesting context?