I installed cyanogenmod on a Nook Color, turning it into a great little tablet, using online instructions and my desktop linux system (appropriately named The Contraption) in about three hours.
Of that, about 15 minutes were actual work, the remaining time was reading how-tos of immensely variable quality. It was quite easy to do but required some hard-headed dedication to learn how to do it.
A one-click installer easily found in an obvious place addresses the only significant drawback of CM!
