bignerds

Some sites that I have seen that are well optimized and do well in terms of search traffic are funadvice.com and fanpop.com, and zimbio.com.

Mixergy has had some good interviews about how sites have built communities over time. As I recall, the interview with the founder of wallstreetoasis.com spent a lot of time talking about techniques he used to build his community from nothing. It might be worth checking out.

I store all of my bookmars in evernote. The chrome and firefox extensions are pretty solid, and make bookmarking very easy.