Taro, I'm on you left out in Southern Ontario. Brandy is out here with me as well as user: Kinyonga. Neither of us have more than a handful of pygmies to provide you with at the moment as we have both set aside breeding them to focus on other things, but I am unsure as to why you are stressing that you need reliable CB pygmy chameleons. First, there is NO large, nor constant source for CBs in all of Canada. Even in all the united states, they are not regularly offered and available as captive bred.
Second point is that this doesn't stop any of us keeping them or breeding or etc, to pass up an opportunity to buy Wild Caught specimens. The most common species you will find are fairly hardy in all honesty IF you provide them with the adequate necessities. You WILL loose some, but buying any WC can be slightly risky, just be sure that you pick the healthiest, appropriate amounts of males to lower stress level, and you shouldn't have too much trouble with their health. They acclimate quite quickly and very well with natural cages like you are making it seems.
One of your reasons for not getting them is their short life spans. They can definitely pass on fairly quickly with ages from 2-3 and slightly longer possibly. But, how does that make it different from true large chameleons. Many females that breed only have lifespans of a few years as well, and because care on may species isn't quite written in stone as of yet, there are plenty of large species that only have a 6 month lifespan in captivity.
Heres the counter point though. When given adequate enclosures, most species of pygmy chameleons that are available to us in Canada, are prolific breeders, thus ensuring that you have future offspring to keep on the lineage of your chameleons. Every once and a while all you have to do is add some new bloodlines when they become available to you.
If you plant this cage densely and provide plenty of filtration and drainage in the bottom, it seems like it would be ideal for pygmy chameleons. (And as a bonus, yes the glass front could be used in this application- though I don't see the glass front working well for larger chameleons.
As I said, I'm in Canada as well. I know your woes about our 0% humidity, as do some of the northern US state members. There are probably more practical ways to cage true chameleons here than what you seems to be leaning towards. If you have msn or contact me by email, I can show you some of my cages that fight the difficult weather here. You can search though my past posts for photos as well.
Also in response to Heika dart frogs would require almost the same habitat as a brev. Darts are not like typical frogs, they like high humidity but not wet.
I found it a little odd that you said this... you said you originally built the tank for dart frogs, but were thinking chameleons instead, but the reason you switched WAS NOT because you thought they would be better suited for it. Now in response to where Heika said pygmies like it humid, but not constantly wet, you say that dart frogs are the same way. Why would you have built the cage with so much water influence if dart frogs are the same way?
Last point, I have never heard of either veileds or panthers living over water, or streams. Doesn't mean it doesn't happen, but as far as I have found there is only one recorded sighting of a chameleon IN water (See Necas book, Jewels) and it was not a species similar to either the veiled or panther.