I recently helped the awesome guys over at Juxt (http://www.juxt.com) to make 6 congratulation animations. Each animation was based on a certain type of greeting. They where then used on a conference held by one of the biggest IT-companies, unfortunately I cant mention their name.
Anyhoo, this is one of my favorites!
Special credit to Sean Metcalf for main concept and art direction.
Check his stuff out here http://dribbble.com/YoungandUnited and here http://seanametcalf.com/