Pretty amazing turnaround time (<24 hours).

So, if we use microchip the VID/PID issue is solved.

If we use AVR, I have another offer (off-list) for more PIDs than we need.

Regards, Mark.

Begin forwarded message:

Subject: Sublicense of USB VID/PID Code
Date: 4 September, 2013 3:05:33 AM HKT

Sublicense of USB VID/PID Code

Subject to the terms and conditions of Microchip Universal Serial Bus Vendor ID Sublicense signed agreement.
The code assigned to you is: 

VID: 0x04D8                                                                                                PID: 0xF5A2
 
The VID/PIDs above are to be used solely with Microchip Microcontrollers.  Use with any other manufacturer devices will result in termination of the sublicense agreement.