There are tons of stats packages out there, but if all you're looking for is a quick peek at your most popular blog posts, referrers, outbound clicks or search engine terms, they're sometimes a bit heavy. Wordpress.com has some great basic snapshot stats, which were missing from the self-hosted Wordpress.org install. Finally , Automattic has made them available for Wordpress.org users as well.
I've used Google Analytics, AWStats, CrazyEgg and Webalizer, each for a different blog-related purpose, but this integrated Dashboard stats package is bound to very quickly become the one I rely on most for quick stats.
I'm considering using Mint in the near future for another project, but if anyone has suggestions, recommendations or warnings against any stats package, do let me know!