If you’re still looking for more reasons to buy a Nexus device, specifically the Galaxy Nexus, consider this another reason. Nexus devices are considered dream phones for hackers because of how open Google is with everything concerning them. In keeping with tradition Google has uploaded the complete factory image of the HSPA+ Galaxy Nexus.
What does that mean? The factory image includes such things as the bootloader, which is like gold to a ROM maker. This is important to you because 1) if you brick your GNEX you can flash it back to factory state, and 2) it will be much easier for devs to create custom ROMS. Without these files it would take much longer for all the custom goodies we love to be created. Follow the link below for more information.
via Android and Me