If you have two iOS devices, then you've got a baby monitor
Baby Monitor 3G connects any combination of iPhone, iPad or iPod Touch to create a baby monitor system with both audio and video capabilities.
Users designate one device as the Baby Station, which stays in the baby's room and uses the device's built-in camera and microphone to monitor the baby. The other device — the Parent Station — is used to watch and listen
While the app offers many benefits — consider the convenience associated with packing for travel — there are a few drawbacks to using this system. One device, for instance, is completely unusable while the baby is asleep. Also, a device has to be left behind as the Parent Station for any childcare provider. And since the app works by connecting through a shared Wi-Fi network, there is no ability to stream a constant video from the baby's room when outside of the house, so no checking in from dinner. Read more...