B.L. Ochman has a great treatise on how to pitch to bloggers. Pay attention to it - it's a very good primer on what bloggers need to perhaps cover your books, your music, your art or even your navel. (Yes, there are blogs dedicated to belly button topics.)
Don't be afraid to pitch to bloggers, really -we're nice folks, just keep in mind how to pitch. If traditional PR folks would learn some of these same techniques the whole world would be a better place. As a journalist, I still get tons of pitches about things I haven't covered in years. Can you say Biotech sector?
So really read up on the folks you want to get covered by and that goes for online, offline, bloggers etc.
Need a real world example? I saw Isabelle Allende last week at a wonderful university event. At the end there was an open 30 minute Q & A - hundreds of folks were at this event, so people that had questions had to go to a mike.
Now imagine the whole crowd's surprise when the first student poses this question, "I haven't read any of your books and am not familiar with your work. A friend brought me here. Can you tell me why I should read your books and what the best one to start with is?"
Hmm. Ms. Allende was more than gracious to this question. Good spirit.
But imagine reaching out to a blogger and basically with the pitch you're sending them saying the same thing, "I haven't read your blog, a PR flak dragged me here - or I'm a PR flak, and I don't have time to read your blog - but will you write about me?"
Not so good.
Make it a goal to read a new blog a week - by the end of the year you will have a read 52 blogs in your peer arena and you will have probably made a relationship or two with at least five of them if you're wiling to reach out to them.
Think of it as speed dating - only with blogs, no drinks and no uncomfortable pauses where you realize even in two minutes or less that you never want to see the person across from you again!
Read a blog a week - don't get obsessed with it and I guarantee you'll make some new friends and find some blogs to frequent and exchange news, links or blogtipping with.