http://www.lockergnome.com/media/2011/07/17/root-nook-color/
LockerGnome's Jake Ludington walks you through the process of rooting a Nook Color. After sharing why he wanted to root his Nook Color to use as a full-featured Android tablet, Jake shows you the steps you go through in rooting your Nook using a microSD card with ManualNooter. Once the Nook Color is rooted, Jake shows you some of the changes made to his Nook. Among other things, this allows you to install software from the full Android Marketplace, instead of being limited to the software made available by Barnes&Noble