This is just to say that I finally splurged and spent about $60 on a Wacom Bamboo Pen tablet this week, and I like it - it ships with a Corel drawing package with plenty of (software) pens, brushes, and erasers.
I bought it in case I need to whip up a quick engineering sketch, as an alternative to scanning a real pen drawing. I find (so far) that I need to press a little harder on this - my hand hurts - but then again, I haven't searched for or played with the "pen sensitivity" slider, which probably is in there.
Here is what a small collection of built-in tools and colors look like:
I like it so far. If you're really serious, you'll find Amazon links to expensive, more advanced stuff.
Amazon: Wacom Bamboo Pen Tablet, with software