Julie Musil blogs books to teach writing. One of the great features of her blog is "Lessons Learned From Book." It features the cover and author then Julie talks about what she learned as a writer from reading the book, and how those lessons can be applied to other writing. It's helpful and never requires a neg review! Gotta love that. She also routinely features writers on her blog.
Jen Daiker blogs at Unedited. Jen's electric. She blogs whatever she wants, but she's supportive of writers. She's usually willing to participate in your blog tour/cover reveal/or post a guest post. She also reviews MG, YA, Chick-lit(her fave) and the occasional picture book.
Also if anyone is interested, I'm looking for help with a blitz for Monday April 15. You can find out more here.