The IIMB PGP99 Birthday calendar is online. You can add it to Google Calendar, iCal or Mozilla Calendar. Here’s the XML version.
IIMB PGP99 Birthday calendar
I published the IIMB PGP99 Birthday calendar online for Google Calendar, iCal, and Mozilla Calendar. You can use the iCal or XML feeds to sync these birthdays and keep track of our cohort's special dates.