Awesome thread, wish I had seen it earlier.
One point on the megas though. The difference between AAA status and AA is Corporate Court membership, that's it.
It was mentioned somewhere that there are AA corps larger than the smallest AAA (don't remember which book of the top of my head). They are all extraterritorial and produce their own currency (a requirement to become an AA), which as far as a wageslave is concerned, actual money. Most workers never see nuyen, at best they might use some of the local country's currency for "slumming" opportunities.
Peter