I almost never find these kind of websites with search, except I already know there might be one on a specific topic. The way I find them is from forums, chat,

I almost never find these kind of websites with search, except I already know there might be one on a specific topic. The way I find them is from forums, chat, links from other such sites. All goes into my RSS reader. I use search with !wiki or !mdn etc. most of the time.