The default wiring plan from MSI is to wire just about every room for telephone and cable TV. We told them not to do cable TV, but let them go ahead with telephone wiring even though we use a cordless phone system. I figured we could use the phone wiring for some other purpose, or pull better cable through their outlets someday if we wanted Ethernet.
Well, when MSI said "telephone" they actually installed cat-5e Ethernet cabling and the corresponding RJ-45 jacks. I don't really know why, and I'm not sure we'll use too much of it since we use wireless LAN. But having an Ethernet run through to the attic is definitely helpful, and today I discovered it's already done.
We'll connect the house to the internet in May. No cable, no phone, just internet.