I have a Aiptek Hyperpen 8000U (http://aiptek.com/products/pctablets/8000u.htm). It's got an 8x6 drawing area and isn't that bad. The only problems I have is every once in a while the pen gets laggy.
I use it very infrequently, though, and only when I draw in Open Canvas.. when making graphics for websites I'm loyal to my laser mouse. http://www.talkgraphics.com/images/smilies/smile.gif