I use several of the Devolo 85 Mbps adaptors as part of my network - 1 PC and 1 network drive connected by standard ethernet, 3 PCs connected by these Devolo connectors, including an Inspire Revo acting as a server (!), wireless draft-n for laptops including work ones that need to be connected via VPN from time to time. The powerline solution works very well and is massively easier than wiring up your house!
Now, if only I could work out why I need so many machines...