From my head on announcements
Many times placing phone calls about the birth is just not feasible. You can customize the birth announcement or just have all the traditional information included on it. You will need to include the name, date of birth, weight and length of the baby since all of your family and friends will want to know those things. Some websites have an online guestbook that will give you an automated notice if one of your friends goes online and signs it. Some birth announcement websites even have photo albums for you to upload your baby pictures too.