In another SPI-proved-the-T608-naysayers-wrong turn of events, Sprint has started issuing rebate checks for the T608 $100 rebate. Most people that mailed in the rebate were initially rejected, due to the rebate center thinking that you had to be a new customer, and then that the T608 was not under the promotion (try and figure that one out).
If you haven’t gotten the rebate yet, first go to www.sprintrebates.com and check the status. If it reads not found, or denied, go read this thread completely as the steps described by forum members are showing success in getting the rebate.