The cutout went great! Took about 2.5 hours, 10 stings or fewer, most through clothing when I got them caught in a crease (knee, etc). One thing I did learn is that I need to wear a full suit or find a pair of pants that stay up...I got a couple stings in my back when the pullover I had on crept up, exposing my tender flesh.
I found about 20 capped queen cells. The homeowner said the swarmed not too long ago. Considering how crammed in they were here, I can't imagine what it was like for them before the swarm!
I have to say, this was pretty easy and a lot of fun. The sawzall was a good tip. If I hadn't bought that, I'd have been screwed. There was no obvious way to pop rivets and remove the wall, especially with 3/8" plywood behind the sheet metal.
Thanks for all the tips; I wouldn't have even attempted it without all of your input and advice.
http://picasaweb.google.com/Moonshae.Beek/Cutout5308