Yesterday, four women we know announced their pregnancies on Facebook. Three of them even posted images of their sonograms. Turns out they were all April Fools' hoaxes. But what about those women who actually use Facebook to share their news with friends and family?

"You should definitely tell close friends and family in person," said one new mom, Karen. "Facebook is a good tool to get the word out after you've told those you're closest to. A good rule of thumb: If they would've heard the news from a third party anyway, they probably won't care if they find out on Facebook."

As far as we're concerned, this rule applies to all major news. If we find out that you're pregnant, engaged, divorcing, moving, etc. through your blog, social-networking site, or even text message or mass e-mail, it makes us wonder how close we were to begin with.

What do you think? Is it tacky to tell your friends about major life changes via Facebook?