Does anyone know a way to send a message to everyone on your network? Is there anything that could be put on my router? I have a number of people that do not all use, or want to use the same IM program. Sometimes I have to take down the router to update firmware or something like that and I would like to be able to send a message to them to let them know. Email and IM don't seem to work because they would have to check their email and IM won't work because they all use different IM programs.