WARNING:This is not for the faint at heart when it comes to hacking Android, it is hard and can ruin your device. There are some super geniuses in the Android community, some of them have figured out how to install the market on Nook Colors. It is not easy and requires you first have your Nook Color rooted and ADB. If have those two things and want to give it a try you can head on over to Enable the Android Market - nookDevs and read through the instructions. Make sure to read them several times over and do not rush anything.