This site runs on the WordPress publishing platform, together with the K2 template. WordPress is what’s going on behind the scenes, and K2 is what you’re actually looking at. WordPress just released 2.9 and K2 is nearing a 1.0 release. The site’s been running on beta and nightly versions of both without problems. So, if you’re still a bit scared to update your site, don’t be. Keep up the good work, WP and K2!