So, if we are willing to Master Reset the device (and reload all apps, redo all setup config, etc.) ... will we have the ability to jump between Gingerbread and Ice Cream Sandwich?
We will publish Android ROM images for the Airpad, so yes, you will be able to jump back and forth.
Furthermore, if you have the inclination, you will be able to customize your ROM. Yes, the usual rules apply, customizing your ROM will void your warranty, so if you are not a expert skier, do not ski down this hill.
We will also add drivers for USB devices as we (or other users) find them. The Airpad includes a USB OTG port, and a regular full size USB host port.
Note, the airpad does work with 3G dongles, but we haven't yet found a US carrier who is willing to support Android tablets. Hopefully this will change. In the meantime, every US carrier (and this is their answer to the dongle issue) now carries mobile hotspots. This is a cell phone-sized device that provides a WiFi hotspot that you control that is hooked up to 3G or 4G.
Another option is to use the hotspot feature provided by your cell phone. Not all cell phones support this, but for the ones that do, this is a low cost way to add 3G to your tablet without having to buy a whole new mobile contract.