A fellow instructor posted a link to a ballet article on Livestron.com , a website supported and promoted by Lance Armstrong.  The article gave some ballet barre exercises that you can do at home.

What amazed me the most was that this was not the only ballet article on the site. There are at least 20 entries about ballet! And there are also videos that demonstrate ballet moves, although I had trouble viewing them.

All of the ballet-related information is under the fitness section of the website. I know from experience that Ballet and Balletone (a cardio fitness class that incorporates ballet movement and pilates based strengthening exercises) are great forms of exercise. Looks like more people are catching on!