Microsoft has made some new changes to the Xbox 360's warranty. The last change was made back in late December when the console warranty was boosted from 90 days to a full year. The latest changes, however, should go a long way to fill in any gaps that may have been missing/lacking in the Xbox 360's warranty service.
The first new change is free shipping for consoles in and out of warranty that are sent in for repair. Microsoft will send a postage paid box to return your console to the repair center.
Secondly, when Microsoft sends you back a repaired console it will come with a fresh one-year repair warranty.