UPDATE: Venue: Find everything you need to know for the day here! http://oabutton.wordpress.com/2013/09/04/open-access-button-hackathon-everything-you-need-to-know/ UPDATE: Venue: Top Office Machines, 133–135 Bethnal Green Road, E2 7DG London, United Kingdom Millions of people a day are denied access to the research they both need and paid for because of paywalls.