Just a little while ago I came across a challenge to create a DIY birth announcement. A new packet of glassine bags was sitting in my cupboard, just itching to be used so I put them to work in these very easy, but very sweet birth announcements.
Just type up the announcement text using your favorite fonts and print it out straight onto the bag. Then slide your favorite picture of your little one inside and seal it with a little piece of patterned tape. I would mail these out in colored envelopes, too, of course, so everyone will know just what a special piece of mail it is as soon as they lay eyes on it.