Last week, I bought a Wacom Bamboo Capture graphics tablet ($99, cheaper at Amazon.com). I have to say it makes portrait pattern design so much easier than using a mouse. Touch the stylus to the pad... press harder for wider lines, back off for thinner lines... click on the eraser tool, press harder for wider erasures, etc. It's probably cut my design time in half, not having to redo innacurate work with the mouse and changing line widths. If you're into design, give it a try.
Tim