Flickr.com wants you to chronicle your day on 05/05/2007, and then you can submit one photo to: http://www.flickr.com/groups/24flickr. And you might just get published in the book!
Oh yeah! From the 24 hour flickr page:
The event will be commemorated by a companion 24 Hours of Flickr book, which will contain a selection of photographs chosen from the group. Additionally, the group’s photos will be featured at Flickr events around the world this summer.
Cool! I had good luck with the America 24/7 project back in May 2003, getting seven photos published. 🙂 (I’ll post more about those seven photos tomorrow.