Barrett Haroldson of Colle+McVoy ad agency worked on Yahoo! Messenger's newest microsite: Emoticarolers, where you can "compose" your own Christmas ditty to be sung by four emoticons sent to the digital doorsteps of your family and friends.
Here's the Neatorama Emoticarollers: Link [Flash] - Thanks Barrett!
BTW, I just found out that Colle+McVoy has worked on quite few interesting microsites featured previously on Neatorama, including the Human Flipbook, Candle Cannon and Yearbook Yourself.