Here is the word from MIT summarized:
There are presently no 'official' AI2 setup tools for LINUX for USB/Emulator. The wifi/Companion works with LINUX as any other platform.
There are a couple of third party packages that have been built by contributors that allow LINUX to be used with the USB or Emulator (see krupon's post above).
Despite what is said several places in the MIT documentation, AI2 can only be used with WIFI at present (unless one of the third party tools is used).
MIT is now aware of the problem in documentation and will fix the problem pages. AI Classic users are aware that AI Classic can be used with the emulator; AI2 cannot.
Will the emulator/usb be supported by MIT on AI2 for LINUX? I do not know. Probably not in the short term.
I hope that explanation helps Shawn. Glad you got a possible solution and please let us know how it works for you. Very sorry about the confusion caused by the problem documentation.
Regards,
Steve