Juliette Wade over at Talk ToYoUniverse is launching an ongoing World Building Workshop. Every week, she'll do a mini-crit/workshop with a submission of up to 500 words. She's looking for submissions now. She has a wonderful world building eye, and I know I find her feedback extremely valuable (she's one of my crit partners) so I highly recommend submitting something to her.
She also has a great post today on POV and pronouns. Nobody explains POV like she does, and I just love it when she gets all technical and breaks out her linguistic mojo. You really understand why POV works like it does.