So, I've read thru the comm. specs and we're golden. All looks like it will work ok, and is pretty darn close to expectations.
If USB protocol has a place to stuff in a serial# when attaching then I can have the PIC supply that info so you can do udev rules or whatever. I was planning to put a serial# in the flash code anyway, only so it'll have some unique ID. It does just appear as a serial tty device.
Sounds great!
We just need to have some udev info different for each PIC so we can distinguish between them. It is not necessary to be the serial number. Any way you have more important stuff to deal with. We will discuss it when time comes

Thank you BkkCoins!!!!