A website called Casting Weekly has a listing up for a Rainbow Rocks live stage show. Unfortunately the site requires a subscription fee just to look at it, but the description is pretty obvious:
Casting for international tour of world premiere
The entry for it actually closes today, so we will probably see the event happen relatively soon. If it's anything like the other shows that tour around Mexico and the Asian countries, it will probably be your typical high school musical style thing.
If you want to be in it and can sign up quick enough though, an international tour sounds like it might be pretty fun.
Thanks to Dusk for sending it.