said by someguynj :
The only thing you can't just exchange for free is the Gen 3 router, revision I. That'll be a 79.99 charge and there's no way to waive it.
Seems very odd. All I had to do was call support when I had a VOD issue. The clueless CSR determined my router was bad. She sent a free router (brand new Rev I). All I had to was to send my Rev D router back with the included shipping tag. I guess I got very lucky.