With Youtube getting over a billion views a day, they have decided to commemorate the three year anniversary of Google buying them with a special logo. It is a bit 'McDonalds'ish' as it includes the the number they serve a day. The McDonalds reference if because of their 'over 99 billion served' tag line.
"According to the official blog, YouTube (YouTube) is serving “well over a billion views a day”. That’s at least 11,574 views per second, 694,444 views per minute, and 41,666,667 views per hour. Imagine the web server farm that can withstand that much traffic, and then remember that YouTube is just one of Google’s (Google) many properties."
Picture embedded below. (from http://youtube-global.blogspot.com/2009/10/y000000000utube.html)