You probably already know about Adventures in Children's Publishing. After all, they have over a thousand followers. But I just found it and can't recommend it highly enough.
Not only does it offer an amazing collection of informative posts (character worksheets, check lists, and the like) and some great contests (today they are offering 13!! giveaways), but once a month, five lucky people get their first 1250 words posted for a month-long workshop, starting with a critique from contributors Martina and Lisa, as well as the other workshop participants and any other followers who want to comment.
I am fortunate to be one of the five this month (my entry is #5 here). I have to say that Martina and Lisa give some of the best critiques I've seen around. When I went through the other entries to add my comments, I found that Lisa and Martina already made my points, better than I ever could.
If you haven't found Adventures in Children's Publishing yet, go check them out. If you want to offer your comments to the workshop entries, I know I (and I'm sure the other participants) would be very grateful. But definitely check out the comments from Lisa and Martina (both on current entries and on the ones from March), because I learned so much just from reading their critiques.