For our first, we found a bottle of barefoot champagne( it reminded me of baby feet) and just told them straight out, this way everyone could celebrate. We didn't have a sonogram or anything. I like the card idea, what if you did a little rhyme, like 2013 brings something new, maybe pink, maybe blue, in august we will see, the baby that makes our family three!
That is an adorable poem. It made me tear up.
OP: When we announced our first baby to our families, it was right after our wedding. I got thank you cards for each set of parents and thanked them for all their help with the wedding and signed it from Hubby, Me, Stepson and Baby. They got it right away.