Well I would need to know what you are loading.
For the canvas, you take the progress and turn it into an angle.
An overly simplified version coincidentally:
Hehe this effect is very cool, I think it would do!
About the canvas plugin thing, the loading stuff I know how to do, my problem is in putting the canvas plugin to work, the draws, etc.
If it's not asking too much, bcause you're helping me a lot already, can you show me a capx or something with the plugin doing the circle animation?