So, I was re-reading the schematics, and while I was looking at the boot settings/hardwired configs (page 18 of the 44-page document you find floating around the web), I noticed there is a way to set a RECOVEY_MODE# flag (seems to use a pulldown resistor for that), setting either "USB Recovery Mode" or tell the SoC to "Boot from secondary device'
I can't really afford messing with my N7 right now, since phone #2 is dead and the good old TF101 needs a new cable...Anyone got any ideas on this, or has a spare, semi-dead/semi-unusable device to see if this has any useful functionality? Might save people who are bricked and without NVFlash/APX blobs...Will try to get my hands on a dead device to push this farther.
Phone #1: LG P920 (Optimus 3D), changing ROMs
Phone #2: Milestone B (A953 in A853 shell), stock Moto crap (broken volume buttons, no flashing
Tab #1: Nexus 7, 2012, WiFi+16GB
Tab #2: Asus EeePad Transformer TF101, stock ICS (broken USB cable, need new one :P )
Test phones: Several
Others: Over 50 WinMo/android/Symbian/other devices in this short life of mine