I've recently discovered a web site called Scribophile. http://www.scribophile.com/
It sounds really good and I'm interested in researching it further. If there aren't any drawbacks that I can find, I would like to become a member someday.
Maybe I'll have my juvi/middle grade book critiqued there. I feel like I should make it better before I submit it, though. It's so not what I wanted it to be. My heart wasn't in it like it should've been. Hopefully I'll find the enthusiasm to re-work it soon. It's probably not as bad as I think it is, but I want it to be great.