Zeil
Chirping
Ice cube molds. I bet they do make good jello molds too.
I have a weird "I really shouldn't be baking in this" feeling about silicone. I have some cup cake liners... and I can not bring myself to use them, but if Zeil likes them, then I might give it a try.
Silicone up to ridiculously high temperatures is an inert substance, if you were to use it in an open fire you might have some problems.
I'm much more concerned about Teflon products and have long banished them from my kitchen, however you'd be amazed how many places they crop up.