For videos beautifully demonstrating ballet movement with terms and definitions http://www.abt.org/education/dictionary/index.html
For some great advice for girls wanting to go en pointe http://www.dance.net/topic/7131320/1/Pointe-Beginners/How-Long-Until-Pointe-Questions-Answered.html
For a great dictionary of ballet terms and definitions
For Ballet Companies listed by state http://dir.yahoo.com/Arts/Performing_Arts/Dance/Ballet/Ballet_Companies/