Flickr had some unexpected downtime yesterday and the screenshot above is from their maintenance page they posted. They had to transfer 20 terabytes of photos between two data centers that were located thousands of miles apart. The site was shutdown to ensure that the transition went smoothly but they still kept people busy by having them enter the contest above!
All you have to do was print out the maintenance page (a copy of the page can be found here) and do something funny with the two circles. Then you are supposed to upload your artwork to Flickr and tag it as flickrcolourcontest. There are already more than 700 submissions so you better get on it if you want to win the Flickr Pro account. Who would have thought that some downtime could be made so fun?