I was introduced to this website in December 2009 and my training has never been the same since! I love it.
For the last 8 months I have been training at circus schools and using aerial fabric or aerial straps which have many of the same strength elements as rings and the strength training can be similar. Consider some elements from my workout on Saturday:
Back lever pulls, front lever (not filmed), roll-ups, side-planche and on the floor- l-sit walks, elbow lever and handstand. Planche training on the mini P-bars was also included and not filmed since I had to choose between a camera and music on my iPhone and I needed a little boost for certain moves.
Side note 1: I now see I should have posted this under "workout logs"
Sind note 2: Finding a good place to train is difficult as an adult, if your local gymnastics gym says no, you might be lucky enough to find a circus school that says yes.