Jeff, as Paul mentioned, I sell the biOrb Air Terrariums and have been for a couple years now. I love them and as you mentioned regarding your wife, they are very attractive. In fact I have sold some to Salons and Parlors as plant only displays.
We have a small showroom in Queens, NY if you want to see one in person. In fact, I am running a special this week for $200 off the MSRP price, which is a great deal on them!
I know people who keep frogs in them, there are a few mods I would suggest, including covering the fan built into the hood with screen just to prevent any potential accidents. It holds humidity pretty well. If you want any further info or want to stop by one day, let me know.