The only reason we have a home line is due to Internet too. We don't actually have a home phone plugged in. I couldn't tell you what our home phone number is.
I'm actually contemplating putting one in in case of an emergency situation. If something happened to DH or I and we were alone with the kids, what happens if they can't find our mobiles? They're usually in our pocket, but what it they can't get it out or if we've got it charging somewhere? DD1 doesn't know about 000 yet, but once she is old enough to understand I think a homeline could be important....