[video=youtube;msj9kSaJhZs]http://youtu.be/msj9kSaJhZs[/video]
For those of you that did not know with S-OFF you are able to flash new Kernels which can improve battery life and cell reception! The Rezound has had an unlocked bootloader for a while which allowed for a custom recovery for flashing Roms and Mods but with S-On it was still impossible to flash new Kernels. The method for gaining S-OFF is not incredibly simple, but very much worth the effort to have a truely modifiable device! The instructions include running a program and doing a "wire trick". Like I said not the simplest method, but you should be good to go if you are ok at reading and following directions!
More info and directions via XDA