Proscenium

Maybe this is a silly question, but then I’d be sillier if I didn’t ask it.
i’m trying to learn about molehill,Stage3D, AGAL, etc.
Should I be also looking at Adobe Proscenium ?
The reason I ask is that it obviously can be used with AS3, but after a day or two studying the downloads, I really can’t make head or tail of it.
So should I stick with it, or wait till a more Flash orientated version appears?