7,000 PEOPLE TAGGED IN ONE FACEBOOK PHOTO

How do you tag 7,000 people in one photo?  Using 36 hi-res photos, taken with two Hasselblad cameras at the Glastonbury Festival in England.  Stitch them together to create a huge 1.3-gigapixel image and then open it up for people to tag themselves on Facebook.  Over 7,000 of the 70,000 in the photo have tagged themselves, making it into the Guinness Book of World Records for most people ever tagged in an online photo. [Gizmodo]