which is open source (BSD) and can be setup to run on your own server... EDIT: That comment seems a little mean spirited (not intended). For casual use, I don'

which is open source (BSD) and can be setup to run on your own server... EDIT: That comment seems a little mean spirited (not intended). For casual use, I don't see a problem with a Google Charts sort of approach, but for big time usage, like say you were doing an Analytics competitor or something, you probably have the resources to run it yourself, and you'd almost certainly be better off doing so.