Grandparent

This is my first grandchild and would like to send an e-mail to my friends and family announcing the arrival. Some of these people do not know my son (nor his name) but I am proud to share the good news with them via e-mail. Can you give me the right etiquette for doing this and how I should phase the announcement..also they may wish to send a gift but how should I write my son's address and not look like we are asking for a present. E-mail has changed so much of the way we communicate and some people are not that close (neighbors) that I want to send a written announcement especially since my son is 45 years old and doesn't really know these people. I just feel I want to share the great news.

Any help will be appreciated.
Elaine