So I've had an idea for a long time now for a niche social bookmarking site I want to build. I think it would be a big earner, but I would need it to rank. All of the big social bookmarking sites get less than 10% of their traffic from searches, most of which is probably people searching for that site specifically, so these sites obviously don't rank well. Is it all the outgoing links that makes this happen? Is it possible to build a bookmarking site that ranks really well? I'd really appreciate some input on this from my fellow brothers. Thanks.