If you're really wanting to try out the Android OS and don't want to change the NC stock device, try running CM7 from an SD card.
http://www.anamardoll.com/2011/04/er...e-on-nook.html
The time investment is about 30 minutes; the money investment is about $70 (assuming you get the same SD card I used, which isn't necessary); and it will really give you the Android Flavor experience more than the NC stock device can.