SnakeAround
Formerly Blutengel
Vermic for me, Jeff. 1:1 ratio in a sealed up ziploc container (much like your rubbermaid containers for your corn condos, just bigger).
The cancer thing doesn't bother me as vermic is routinely tested and to my knowledge none has come up carrying asbestos lately at all. I do believe those mines were closed down.
Plus vermic is a hell of a lot cheaper than buying good grade moss---and from what I've seen people have had fly problems on moss---but I've never seen it happen on vermic.
Personally I'd rather go with a mineral that doesn't allow mold growth and things like that, but it's just me.
I have mold growing on top of the vermiculite layer in one of my boxes... and it is a good quality, said to be free of any contaminents brand of vermiculite.