Be careful though. It's not as simple as just contacting them all. You really, really, really, really need a story that's of the sort they actually publish.

I get relevant press releases from time to time that are in my industry/field but are so "corporatey" that there's little my readers would really care about. Twist whatever you have to say into a story that fits the mold of what the blog already posts - it might take reading their entire front page to get a feel for this ;-)