Ballerinas are everywhere right now. Yay. There are ballerinas on the big screen in Black Swan with Natalie Portman, and there are ballerinas in Kanye West's video and movie for his song Runaway. Whether you like Kanye or this song, you can enjoy the beauty and grace of Kanye's band of ballerinas in this extended version (about 8 min) of his music video for Runaway. (You really should watch it at this link so you can make it full screen. Also, I recommend watching in 1080 HD.)
You can see Kanye's 34 minute movie, from which the above 8 minutes is excerpted, on Vevo here.
Update moments later: Also, there's a history of ballet in the New York Times list of Notable Books for 2010. It's APOLLO’S ANGELS: A History of Ballet, by Jennifer Homans. "The question of classical ballet’s very survival lies at the heart of this eloquent, truly definitive history, which traces dance across four centuries of wars and revolutions, both artistic and political."
Update 12/2/10: Here's a screen cap of the names of the ballerinas in Kanye's video and movie: