You've Dropped Your Landline — Now What?

smurphmeister writes "My wife and I recently moved up to the world of cell phones, after taking our sweet time to make sure this whole newfangled technology was going to stick around. We moved the old landline phone number to her phone, so we're disconnected from the pole. Now the question is, what to do with the copper already in our house? My first thought was an intercom system, but that just seems so old school! So what ideas do you all have for what to do with the 4 little wires running to every room of my house?"