I strive to attract writers and readers with my blog.. For this I must offer something in return.
Brandon Sanderson's Lectures
These are videos of (fantasy / scifi) writing classes taught by author Brandon Sanderson. If you haven't heard of him, look him up... Or don't, it doesn't matter. Watch 5 minutes of one of these videos and you will see that he has tons to say on all manner of topics to do with writing!
This is easily the single most useful resource I have found.
As far as community, information and feedback, check out www.querytracker.net (follow link to forum)
The more resources I become aware of, the more I will let you know!
(ADVISORY: you may begin watching these videos and simply not want to stop... that started for me two days ago. I'll let you know when I'm done.)