I've done Daring Fireball several times for The Little App Factory (tlaf.com). While the immediate response is fairly good, I believe the real payoff is more long term. Publishers and the hardcore mac community notices what's advertised there and may be more inclined to write-up your product or service.
Note that you can bootstrap your way into this sort of effect by figuring out what your influencer of choice (blogger, NYT journalist, whatever) is likely to be searching for and then putting AdWords against it. Since they're often a bit smarter than the average bear and using longtail or obviously non-commercial queries, these are generally cheap as sin.
Then, rather than a landing page for a commercial service, you direct them to a page designed to elicit coverage of whatever it is that you're offering.
An example that I don't know that any SEO did so they won't be POed if I mention it: you know all the Facebook privacy hubub right now? I think it is quite likely that someone is out there looking for [facebook privacy quote]. If you're going to spend thousands on PR, why not spend a few tens on AdWords and have something responsive to that. It is very, very cheap if your page influences coverage at the NYT or pulls in links from bloggers.
