I find EmacsWiki to be a great resource. Just getting into using emacs and the how-tos are very useful.
Formerly I had no religious preference in text editors but since I've started to learn Lisp emacs' gravity has pulled me in. Thanks for the pointer to http://www.cliki.net/, looks like a good site I hadn't seen before.
I use emacs with my Rails work. My biggest complaint is that Emacs is hard, but the community is relatively unfriendly. It seems to have inherited the Lisp culture - it is not kind to noobs.
In contrast, I found installing Ubuntu to be hard as well, as several pieces of my hardware were not well-supported. I asked many questions, some of them quite basic, and always received prompt, patient help.
Social news sites never seem to be strictly news, sometimes in complete contempt of their domain or site names. Personally I blame, in order: the term 'Web 2.0', Wikipedia, and the rap music.
But bookmarks of new pages at least, which are notable for their currency. This is just an emacs site. It's like posting a link to http://google.com and calling it "Search" or something...
Whenever I have a problem, it and cliki.net (a great source for finding obscure, but useful, Lisp libraries) are the first two places I turn.