After a few false starts, the OS X-installing EFi-X dongle is finally shipping to consumers. Currently, two versions are up for grabs: the USB V1 for the average joe / jane and the USB V2 Developers Unit for, well, developers. In short, plugging this gem into your PC will enable select systems to install OS X, but we'd take a hard look at the fine print (and certified systems) before blindly plunking down $155 and hoping for the best.