The Glastonbury Festival, a long running music and performing arts festival (this year’s Festival is the 40th), has embraced social media this year. The Festival has its own blog and also developed an interactive mobile app. to help attendees plan and navigate their way around, and make sure they saw all of the hottest acts in the lineup. During the festival, a HUGE photo of festival goers (around 70,000 people) was snapped and is now being tagged via Facebook. Mashable have labelled the enormous photo tagging effort as a “Where’s Waldo for the digital age” – tag yourself, tag your friends … if you can find them! So far just over 2,500 individuals have been tagged.