Can "Refit" Allow A Boot From USB Optical Drive

Since the new Mac Mini 2011 has no optical drive, how would one make a generic USB 2.0 optical drive act as a boot device? I have heard that a utility called "Refit" can alter the boot loading order and device choices in Macs. I suppose it is also possible that the new Mini may already be set up to boot first from USB. I would appreciate any comments. It would be nice to have some kind of optical drive boot option for Windows installation and other possible utilities that need to boot before the OS in order to work. Maybe I will have to take my external optical drive to an Apple store to find out. Hope not. I also suspect that a USB keyboard will be mandatory for "Refit" and the boot drive to be used before Mac OS X is loaded.