I've been looking at this one for awhile.
The 30 Day Photo Challenge began on Facebook, and is popular mostly among Canadian users on Facebook, Tumblr, Blogger, and other social networking sites. It requires users to post a different photo every day, each depicting some aspect of their life or personality. Although it's called the 30 Day Photo Challenge, it actually has 31 criteria.
Day 01 – A picture of yourself with ten facts
Day 02 – A picture of you and the person you have been closest with the longest
Day 03 – A picture of the cast from your favorite show
Day 04 – A picture of your night
Day 05 – A picture of your favorite memory
Day 06 – A picture of a person you'd love to trade places with for a day
Day 07 – A picture of your most treasured item
Day 08 – A picture that makes you laugh
Day 09 – A picture of the person who has gotten you through the most
Day 10 – A picture of the person you do the most f*cked up things with
Day 11 – A picture of something you hate
Day 12 – A picture of something you love
Day 13 – A picture of your favorite band or artist
Day 14 – A picture of someone you could never imagine your life without
Day 15 – A picture of something you want to do before you die
Day 16 – A picture of someone who inspires you
Day 17 – A picture of something that has made a huge impact on your life recently
Day 18 – A picture of your biggest insecurity
Day 19 – A picture and a letter
Day 20 – A picture of somewhere you'd love to travel
Day 21 – A picture of something you wish you could forget
Day 22 – A picture of something you wish you were better at
Day 23 – A picture of your favorite book
Day 24 – A picture of something you wish you could change
Day 25 – A picture of your day
Day 26 – A picture of something that means a lot to you
Day 27 – A picture of yourself and a family member
Day 28 – A picture of something you're afraid of
Day 29 – A picture that can always make you smile
Day 30 – A picture of someone you miss
Day 31 – A picture of yourself
http://www.google.com/insights/search/#q=30%20day%20photo%20challenge%2C30%20day%20picture%20challenge%2C30%20day%20photo%20challenge%20facebook&date=5%2F2010%208m&cmpt=q
Thoughts?