When my little man arrived I wanted to send out an electronic announcement...It seems that these days I don't keep everyone's addresses anymore but I have their emails...I found a very awesome eannouncement at http://www.hallmark.com/online/product/ecards/ . You have to register as a user on Hallmark and then you have to register as a user on Smilebox... but the results are very cute and very cool. It can be emailed, posted to your twitter, facebook, and blog.
I am hoping to use ecards for the grandparents often so that they can get pictures of my little guy often. I particularly like that this is a free service!