I use StatCounter and Google Analytics. Google pretty much blows any other stats package away, and it’s free (just the waiting list as mentioned). Used to be Urchin before Google bought them, which was known as one of the top weblog analyzers out there. I still use StatCounter as well, as I like how their daily reports are presented, and it’s easier to figure out who is a real person visiting your site (where they came from and where they went), you have to dig a little in Google Analytics to get to this data.