I still have mine, because
2) I have DSL Internet with AT&T (which fortunately is fast).
I, too, have AT&T DSL. I had my landline cut this past Christmas and I don't miss it. My cellphone is with AT&T, also, so we just transferred my DSL from my landline account to the cellphone account.
The only real concern I have with losing the landline is being able to make a phone call if there is a major earthquake and the cell towers are offline. I don't think they go offline when there is a major power outage that isn't earthquake related so I should be fine there. We will see, though.
The only annoyance I've had with cutting my landline so far has been the kids. My son gave my cellphone number to his friends because we haven't gotten a third line cellphone for the kids to use, yet. We'll get that sooner or later (probably later). My son has figured out that he can communicate with his school friends to collaborate on projects and homework and stuff via email and IM so I haven't gotten any calls lately from them.
We saved some money, but not a whole bunch. Part of the reason for waiting to activate a third phone is that we are trying to offset the fees incurred when we transferred the DSL from the landline to the cellphone account. When we finally add the third line we will be saving around $15 a month.