I was so excited to hear a while back that discussion-site Ballet Talk opened up a bit more so that those of us with non-paid e-mail providers (for example, GMail) can participate. Hurray!
Google searches have sometimes shown me intriguing comments or snippets of information from this site. And now, I’m happy to say, I can access them fully.
You can register too, if you like. Here’s the link: http://ballettalk.invisionzone.com/
Note that it’s for folks 16 and older. It’s not so much for dancers as it is for the audience (i.e., they have a different site for folks who want to talk about which classes are best, how to use pointe shoes, etc.)