What about wet/jungle heat on them?
Along with insects, I'm thinking the Blight kills most other forms of microbiology as well. I don't think the heat and wet of the jungle would have as big an affect as it normally does on a corpse. They're still walking around out in there and will be for awhile.
Are people with immunity called 1%ers?
No. They've got a big lead in the Loss, that's for certain, but it compensates for how shitty their lives will be if they get sold to a Pharma company, kidnapped by the government, or eaten by cultist that believe their flesh is magic.
Guard dogs you say? http://en.wikipedia.org/wiki/Tibetan_Mastiff
Go for it, but while it can bite zombies for you, actually eating them will kill the pooch. Good luck paying it's food bill!
Do the casualties regenerate? If one gets tricked off a 20 story building will they ever get up again? Can you bleed them out?
The Blight can, but not the body of the host it is infecting. I'm saving that kind of stuff for the Aberrant types. Falling off a building 20 stories tall would crush the skull and kill a Casualty instantly. They can't be bled out. It's a head shot, crippling shot, or you might as well as missed them. Everything else is just dead flesh dancing on millions of razor-thin, black sinews.
Can casualties be burned for warmth or power or any other useful product? Does burning them spread the infection or cleans it?
Burned for heat? The human body isn't the most efficient fuel source. They could be used for physical power if you were crazy enough to strap them to a treadmill or something, but weigh the risks and rewards there. Burning them does kill most of the Blight, but you've got to burn the interior of the brain stem or the entirety of the body before they go down.
What other cyber currencies do people use?
Don't know how much I want to get into it. While currency exchange rates is something I have no doubt a certain type of grognard would get into, I can't think of a way it would be fun at the table. That's why I'm currently leaning towards just expressing everything in Bounty.
I'm kind of imagining an ecosystem building around around hunting drones for their parts and goodies.
That's a good idea, especially considering that the Enclaves and Settlements starving as result would be sending people to hunt those characters down. Rife for gaming material there.