Docstoc

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I think scribd has got a considerable lead on them, even if they are considered niche players. Docstoc's second Series A round will certainly help them evolve their strategy There are a number of companies emerging in the document sharing space. One company that I recently heard about through a friend stands out. The company is called bookgoo - http://www.bookgoo.com. They have been really quiet. But, the site is quite interesting. They are running a closed alpha right now. But you can win an invitation by playing a pacman game and obtaining a certain score. It's cute, and certainly nothing I've seen before with closed sites. The site itself allows you to highlight and annotate sections of the document. Takes a variety of doc types including URLs. Very compelling experience.