Hi Geoff!
Sounds like you've got a pretty good set-up there. I'm a little concerned about the placement of the UV tube though. Chameleons need to be within 12" of the light to receive the proper (if you can call it that!) UV absorption. If your new chameleon spends his time on the other side of the cage, then he's not getting the UV. Not a big deal though, when you finally purchase one, you can watch where he spends most of his time and adjust the UV tube and ballast accordingly.
Panther Chameleons need a basking spot of 90-95F. So your 100watt light bulb may, in fact, be suitable for you for a cage that size. You've got a thermometer, so double check that the area isn't too hot.
Just a few tips that I can think of off the top of my head. Otherwise your set-up sounds fantastic! You've got non-toxic plants, lots of climbing/basking/hiding areas, drippers etc. I think you are more than ready to go! Now you just need to find a chameleon.
Post some pics when you finally get him!
Oh, and one last thing... click
here for one more decent caresheet on Panther Chameleons
Cheers!
Trace
Jason: If your Panther Chameleon is not basking, maybe YOUR basking is too hot or it's not in the right spot for the comfort/security of Max. I think you should get yourself a thermometer to ensure your husbandry is correct.