Birthdays Synchronizer is a free facebook desktop application developed by me, which allows you to sync your friends’ birthdays to your favorite calendar (outlook or google).
When you first open the application, you can select which friends from facebook you would like to be reminded of in your calendar. Then you can customize your preference (select calendar folder, reminder time, etc) and sync those birthdays!
You can then sync your calendar with your mobile device – making sure you will never forget about your friends’ birthdays!
Try it out yourself, by visiting http://apps.facebook.com/bdayssync/