On first blush, STDs seems like a taboo topic, one that immediately seems to clash with the idea of "sharing," which helps power Foursquare . But, then, think about it. What if you could know someone you're thinking of dating has been tested? What if this all lead to the end of the stigma and trepidation attached to getting a VD test?
And in more inside-Foursquare clips, Walker tells how the company found itself in partnership with Jimmy Choo.
Videos edited by Adam Barenblat
Read More: Most Innovative Companies: Foursquare