I still have a landline, although I don't tend to use it much. I can't stand my utility suppliers and other company's like TV Licensing ringing my mobile phone, so they all have my landline, and never get my mobile number, despite continually trying to do so.
I'm with Virgin Media here in the UK, using fibre-optic broadband. I think the difference between having a landline and not having one is like £2-3 a month when you take out broadband, so not too bothered really. I also have a HD TV box from them as well, which costs me nothing monthly, gives me all the freeview channels (plus a few more) and catch up and on-demand TV for nothing extra. Saves on a digital aerial, and the whole digital switch-over rubbish our country is phasing in right now.
If it was costing me more money I'd consider Skype and getting a landline number through them, but a couple of quid a month to have a landline really isn't all that bad. We also suffer a lot with 0845 (lets screw you loads on a mobile) numbers here in the UK, so having a landline for those alone makes sense - your talking ££'s to ring them from my mobile as its not included in the inclusive minutes.