My personal favorite is www.absolutewrite.com
I've gotten a lot out of them, and they're great, but sometimes it's nice to commiserate in person, see the physical responses of people reading your work, and of course, get the $&%^ out of the house once in a while.
To that end, I figured I try and start a lil writing group in my area. There are already existing ones, but the happy, fluffy clouds and bunnies 'all writing is good and we welcome everything' love fest isn't all that useful to me.
Rather than trying to call everyone I thought might be interested, I put out an update on facebook, to see who might be interested. (Pre figuring that a third of those who expressed interest would actually show up).
Then, I picked a time and place. I asked about people's schedules, made an educated guess about who would actually show, and picked the location and hour based on that.
Three people showed up, which worked fairly well. I hope to expand the group, but for a first meeting, having more than one person appear was more than I honestly expected. And the enthusiasm more than made up for it - people appeared with shiny new notebooks and pens!
I asked about peoples' goals (after sending an email informing them to think about it). No one seems particularly sure, beyond 'I want to write'. That's okay.
It was very relaxed and silly, and I've given my first assignment. We'll see how that progresses next week.