How to get your Facebook friend’s birthdays in your calendar

If you're as geeky as I am you are probably sick of Facebook. No offense to the lovely people behind the social networking Mecca. It's just that I do most of my socializing on Twitter these days. Aside from managing some client's ad campaigns on Facebook, managing the RSVP for the Geek Breakfasts and checking birthdays, I don't have very much reason to log in.