I'm not quite sure how it will happen, but at some point I think it will be beneficial to commoditize the underlying crawl and index data, so that there can be

I'm not quite sure how it will happen, but at some point I think it will be beneficial to commoditize the underlying crawl and index data, so that there can be more domain specific focus and more diverse sources of innovation applied to solving this and other search problems. One or two sources trying to be all things to all people and all problems isn't going to scale. Blekko's slashtags are a good start, but it needs to go much further.