It's not as "hack"-y as a HN reader might like, but the bottom line is you should help your journalist tell a story. That's their job, so make it easy.
When we launched Precorder, we got little (and so-so) press by describing a newly launched app w/ X Y and Z features.
When we started telling writers that we saw the camera technology used to capture great white sharks jumping out of the ocean and ported it to iPhones, we were covered by Kottke (http://kottke.org/11/01/precorder) and other influential photography bloggers who immediately triggered a long wave of follow-up press.
This, this, this. If you subtly lay out the possible angles and all the interesting data for a journalist, they will be that much more likely to cover your product. Don't make them do too much research.