Here's my latest idea that would make me rich if I could build it, program it, patent it, and market it...
A Wifi baby monitor. Here's how it would work. You plug in the baby monitor next to baby. If baby makes too much noise, then everyone on your LAN would receive an alert saying "baby is crying."
It would then open a chat window so that all the members of the household who are awake and online could debate whose turn it is to get the baby.
This is absolutely necessary in my home, since Yaakov watches his movies or plays his piano with earphones while I listen to music with earphones while I work at night.