Yea, it's very hard to get noticed and picked up by blogs. I'm sure these blogs get hundreds of emails a day, and the big guys (such as Chillingo) get noticed first since they probably have direct avenues to reviewers etc.
We've entered into the pre-marketing phase of our game 'Goop', and so far it's definitely been quite the challenge. We've got a decent number of views and comments in our upcoming post forum post
, but the real challenge is actually getting written about by these blogs. But we'll truck through it and see how far we can take it ourselves.