With DD we hung out together for about 3 hours before contacting anyone. We loved the fact that it was just us and everyone had been bugging us for SOOO long as I was more than 1 week overdue. Then DH called his folks and I called mine.

With DS (being born just before midnight) we sent a text to DH's parents (who were looking after DD) as we didn't want to wake the whole household. Then sent a mass sms message to other family and friend once we'd had a little sleep etc at about 7 in the morn. It was wonderful having him at a crazy hour so we could just enjoy those first 12 hours by ourselves.