When dual booting Linux and Windows, updating Windows causes GRUB to disappear. This is how I fixed it.
A list of addons I'm using, periodically updated as I discover new ones or get tired of ones used.
Hacking Wordpress: check contact messages for spam using Wordpress' built-in Akismet spam for comments
If you want a contact form that uses Akismet instead of Captcha to filter spam.
Lecture notes from November 2, 2009, Education 60, a intro class at UC Santa Cruz