Dorothy Gambrell does wonderful, whimsical charts on her blog Very Small Array. This one tracks the popularity of her Cat and Girl book relative to world population. Canadians love their Cat and Girl!
This one – a year in review – tracks various things. Gambrell seems to do this one every year. I just really like the way Gambrell communicates visually – her sensibility is apparent in all her comics, but sometimes I think this other non-comic stuff is more representative of some "ur-Gambrell" quality she has.
Also add Gambrell to the "webcomics goin' to hell in a handbasket" list for this one.