I use Google Analytics, but also the
WP Stats available from WordPress.com. Hey, you've got that WP API key for Akismet, why not give their stats a run, too. It's not near as comprehensive as Analytics, but it's good for at-a-glance stats, where you want to see the basics of which pages were popular and how many views, referrers, links clicked, etc. It does the job, and I check up on Analytics not as often for more indepth stuff like bounce rates, exit pages, resolutions used, that kind of thing.