OK, i bought a pair of Solwise HomePlug Ethernet Turbos (85 mbps), they came today, very easy setup - ethernet into my Netgear DG834GT router and other end into the plug which in-turn went into the wall socket next to the router which is on the first floor very close to my front door and sitting on a large sideboard. Next plugged the other adapter into a wall socket next to my PC with ethernet cable running from that to my PC (which is in my bedroom on the third floor), i also installed the Utility on the Diagnostic CD, more to monitor speeds than anything, and note that you don't need to install anything software side whatsoever.
Now bearing in mind i am as far away from the router as possible in my house which is pretty big if i do say so myself, and i get a solid 60 mbps now i think thats pretty damn good, and my download speeds have doubled over my previous wireless setup (which was a 108 mbps network) and has lessend my ping by around 20.
All in all a great substitute to having a really long wire around the house, and a hassle free installation. What i would say though is try and plug it directly into the wall socket and try and stay away from using it through too many adapters, i mean a 2 or 3 way adapter should be fine, but if you start using these 7 or 8 plug extension leads and adapters you can get some interference as i discovered, however i didn't want to use the adapter like this and it was only a test on my behalf.
I would do a review for the site if the people in charge approved it and told me how to get it on the site. Thumbs up from me, easily better than wireless, and only a shade off the full wired in connection, however i reckon this is much more convenient for those of us who can't have the router at the top of a 3 story house lol.
I got my pair off ebay, good price for what you get. Comes with Diagnostic CD, 2x 1.8m Ethernet cables, 2x Solwise 85 mbps adapters and a well documented instruction manual - although i didn't use this i had a glance at it when i was already up and running.
Hope this helps,