UNIQLOCK is
a nice example of a viral program that works. Site visitors are invited to
embed a clock on their blog, Facebook or iGoogle page. Embeds fuel the motion
of a map-based visualization of the physical origin of participants. As the map
jumps around to display the time in different embed locations, site visitors can link
off to the embed sites. This makes the site an interestingly random way to
discover content from all over the world.

Dan Neumann