You can watch Yoko's video here. It's pretty sweet—and sure to garner quite a few touching fan tributes.
A slightly stranger tribute came from the Rock and Roll Hall of Fame and Museum in Cleveland, which decided to create a time capsule for the singer. It will be opened in 2040, on his 100th birthday and contains CDs and other memorabilia.
Personally, we think the best way to honor the day is by revisiting some of his greatest hits. Let's start with the obvious:
Fans Celebrate Lennon On Birthday [CBC News]