I run a writing site, http://www.sffmuse.com which is rather laid back. I hang out at http://www.nanowrimo.org every November and do my annual novel -- even if the year is full of other things I'm doing, I will knock out one novel for Nanowrimo or maybe two or three during November. Best year was two long ones in 2004, both so good they are now my current rewrite projects.
I used to belong to another writing community but some flame wars threw me out. I got blocked by IP for living with one of the flamers and "once banned always banned" is the policy, so now I can't go back even though I had a falling out with that bloke and no longer live with him. Annoying. It was fun while it lasted but I'm not looking for a replacement. I hang out on art sites now where the artists often tell me "You should be a writer."
I also blog. I think I have a vague writing community among my friends on http://robertsloan2.livejournal.com -- my blog there goes way back to 2000 when I first got out of the homeless shelter and got online access. Lots of writer friends, lots of support.
Now that I have a book to market, I've gotten into the Facebook thing and twittering just seems silly, but some tell me that it is a useful marketing tool. I dunno, I'm not big on triviality, and most of what cycles through the web is trivial at best.
Everyone is free to visit my facebook account at http://www.facebook.com/edcordevilla.
I don't do that.
FairTax Nation, Campaign for liberty, News, History, and a variety of other things.
I email and blog. I use Classmates to get out my ideas also.
myspace and sodahead
I have a web site, a myspace page and a Facebook page.
Sourze.se a swedish internetbased organ for everyone to write in.
Poeter.se a swedish internetbased organ for poets and writers.
That is all for now about that.
Right now I prefer to expose my work for its own value without displaying my credentials or achievements. I want to be judges purely on quality and consistency.
I don't write a lot online or in forums. I'm at www.authorsden.com and www.goodreads.com and writersdigest.com ..some of the social sites. I do Twitter very regularly though. Very entertaining.
Mostly news sites on the computer. Also, writing is a solitary business and there is a lack of communication between writers. Why that is, I am not sure.
Television Without Pity, Huffington Post, Open Salon, New Cafe,
The sites I frequent on-line are news sites or food sites. I read politics frequently. And surround myself with food wisdom. HuffingtonPost.com and FoodBuzz.com are favorites.
HTML giant, but really online stuff is a strict tool, or you get lost and never write anything.