Blogging in Motion

Yahoo's Hack Day winner was Blogging in Motion.
Jeremy Zawodny's Recap has a quick summary of the event.

From David Homack at Venture Blog:

The fact that Yahoo embraced engineers from startups and design shops throughout the ecosystem is indicative of the sort of coopetition that is going on around the web these days.
Big organizations like Yahoo, Google and Amazon are making significant pieces of their infrastructure available to third parties for development of new applications.

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