Google Wave entered our consciousness in 2009. Even though it's still very much evolving, many, including me [1], saw its potential as a collaboration platform moving into the future.
This video uses Wave technology to summarize the year that was. It examplifes how this technology works and is fun way to close out the year on FierceContentManagement.
WATCH THE VIDEO [2]
Links:
[1] http://www.daniweb.com/news/story235180.html
[2] http://www.fiercecontentmanagement.com/pages/waving-goodbye-2009