Landlines, who needs ’em?

I’m thinking about ditching DSL and getting Cable Internet, thus allowing us to ditch our landline. The cost of cable internet is equivalent to my DSL right now, or so I recently realized when I saw that our ISP (speedfactory) has starting charging an extra $10/mo because we have computers networked to our router, allowing all to access the internet instead of just one.

The only downside I can think of is updating all those hundreds of official documents out there in the universe that have our home phone number on it.

Anyone else know of a snag?