[bryanthompson]

procon, that scratch resistent lexan sounds good for the front and back. if you could find out the name of it, or whatever I'd need to say to my glass company friends to make sure I get the right stuff, that'd be great.

928, I like the idea of using the metal trim piece on the inside like you showed there. That looks like the perfect way, plus I can sandwich the mesh between the wood and the metal on the sides.

I need to do a little more research... Does silicone leave lingering fumes that might harm the birds? I know they make those little felt pieces that will fit between the glass and wood/metal, so that might be an okay way to keep some air circulation through the edges while still keeping it from rattling...