Normally when you want bloggers to blog about your site, are you interested in: 1. Link development? or 2. Just them blogging about your site? which do you value more?
links! blog links are great... IMO search engines see them as natural links you get a link in the middle of a keyword filled blog post
It depends on the blog. If the blog has a large audience of regular readers, then having your blog talked about could be more valuable than a simple link.
Both are good. It's always good to get impartial feedback from blogs, because that's one of the best ways to find out what people think about your site. But I'd rather have the first than the second, if I had to choose.
I got about 4 people so far talking about my blog, one of them was spanish and the other one was following my marketing steps one by one and he seems to like it : adsense-journey.blogspot.com/ and we exchanged links also ...
I personally like both. I had someone blog about my site and I got a little traffic from it. Who knows, maybe they will be repeat visitors. You can see imediate traffic, but the link will also be beneficial for you long term, like munt said, it's a more natural link.
pay bloggers to post about your site , or have a contest and give gift/reward to blogger who writes best about you .however i think blogs with good traffic is useful .
If high PR blog, then link development. If high traffic blog, then word of mouth and exposure. If high PR and high traffic, then both