Good question, flukx. Thanks for starting this thread.
DC is the only site for me.
I'm looking forward to getting some good ideas in this discussion, though. Right now I really just use epicurious.com for all of my recipes, but this is the only community to which I belong (and I'm new here). I like epicurious because you can trust most of the recipes, and their rating/review section makes it feel like a community. Recipezaar.com is less pretentious, and it allows users to post their own recipes that can then be rated by other users. But these are merely recipe sites, not blogs.