I've been working on a bot that basically scrapes content from various sources that isn't indexed, be it expired, deindexed or not indexed for various other reasons. The point being is that the content is 100% orginal in the eyes of a search engine. For example if I type in "cigars" it'll generate 1000's of 1000's of words of content on this targeted keyword. I've actually built several sites here recently using this content and all of my web 2.0s have orginal content as well. The bot still needs work filtering out which content is worth while and which content is crap.