Thanks, guys! This wasn't meant to be the definitive statement on mounting, but more an entre into the discussion.

Murray made an interesting point on aromatic tree branches. I never considered the oils before.

I think you're safe with tried mounts, but if you want to venture into new territory for the 'perfect' mount, be aware of the risks.

Tindo, some really cute mini (maybe your avatar) mounted to a bonsai in a terrarium would be the be-all orchid and mount!

PM Gin for cactus skeleton sources - she's posted previously about those. I have sources for tree fern and cork bark. (I'm thinking I read something somewhere about tree fern pH being a potential issue for orchids. I can't swear to it, but if you're considering tree fern, but sure to look into that.) Cork bark is very safe.

Cheers,
Julie