Powerlines will only work around the whole premises if each ring main or radial circuit in the house is connected up to the same earthed connector block in your fusebox/consumer unit.
I am also interested in PowerLine, right now I run wifi around the house, but I have 1 foot thick solid brick walls and the coverage is terrible.
I don't know how I would be able to set it up, because I need my router connected (obviously) as well as two PC's downstairs and a YouView TV box.
I have seen triple and quad PL packs on the net, but they seem to be pretty rare, that is really what I need and it would be good if the main unit which connected to the router would assign its own IP to each of the unit's detected around the house, but then I don't know how that would work with DHCP, can a specific device request more than 1 IP Address?
Sorry for the Hi-jack
EDIT: Done a bit of research
£30, Quad pack, it says plug one into your router, and the others into any other devices you want to connect!
http://www.faculty-x.net/homeplug value range.htm
These are the 85Mb plugs, others can be found on the site but are more expensive.
I would pick up a pair and see how they all work for you guys, but I have already bought a Wireless AP which will be enabled as soon as my room is completed, I am hoping that this will sort out my network coverage.