I have a Classic Nook and have always found that using the touchscreen keyboard was hard and I found I was always hitting the wrong keys. Well I found a stylus that really works!
Kensington 2nd Generation Apple iPad / iPhone / iPod / Motorola Xoom Tablet / Galaxy / Blackberry Playbook Stylus and Pen

I found it at Amazon.com. It also is a regular pen as well. I love the texture of the outside as there is a slight texture so very easy to hold on to without slipping. I love the idea that it's also a pen as well. The stylus is slim so hitting the correct letters on the keyboard is very easy and it works great!