This one is not for the faint of heart. After Barnes & Noble released the upgraded Nook Tablet in November, early buyers were surprised and angry to find a locked bootloader and a mere 1GB of user-accessible storage. Now a brave XDA modder has combined some of the latest software tricks with an actual physical modification of the main circuit board (remember those, console gamers?) to make a permanent custom kernel. Forum poster "hkvc" calls his solution NOP Based Security Bypass.