Nook Torn Open, Hacked and Rooted Dec 15, 2009, 04 :32 UTC (0 Talkback[s]) (6210 reads) (Other stories by Charlie Sorrel)
"If you tear open a Nook (which the team has done) you’ll find that the Android operating system is contained on a microSD card (separate from the microSD expansion slot). From here, it’s a simple matter of using a card reader to mount this card on your computer and changing a single word in the init.rc file"