So B&N just sent out an email announcing that the Nook SDK is now available. Now any Android developer can port their app to the NookColor. There's one detail I want you to notice. This is actually the NookColor SDK and it will not help you port Android apps to the Nook. Isn't that interesting? B&N want people to develop for their platform, but only for their tablet and not the more numerous Nook ereader. I wonder why? Yes, I know they announced that it would be for the NookColor back when the NC was launched, but I half expected the SDK to support both platforms.
BTW, I'm not sure this is worth the bother. The NC has been hacked, and apparently it's a bog standard Android tablet. Here's a long list of apps that have been tried and work just fine. Look it over, and then ask yourself if you really want to have to work through B&N.