We won't know until we actually try it, but three things I am pretty sure about: 1) We can boot from micro SD card no problem (fanoush has done this) 2) We can backup rootfs using dd - this confirms it : http://metalab.at/wiki/Hack-A-N900/D...e_rootfs_Image (we have access to micro sd storage). 3) We can reflash using the reflasher (see link above) So what does this mean? This means we can completely restore the N900 to an exact state! HOWEVER whats more useful is that we have ACCESS to the rootfs!!!!! I remeber I made changes to one text file - and this bricked my N900, if I could have booted from Micro sd then I could have EASILY fixed it without reflashing! Either way we should have a way to restore our N900s properly! I don't trust the backup manager.