Newb question - Using power outlets for networking?

I have seen the equipment such as this:
http://www.netgear.com/Products/Br [...] XE102.aspx

Using that as an example.

What I would like to do:
- using my router, create another highspeed access point upstairs in the bedroom and another one in the basement (finished).

What I have:
- Dlink Gaming GB Router. It has a wireless broadcast, but that is still limited to 54mpbs? I think.

Questions:
Do any of these wallplug extenders really work?
What is the max speed of data transfer?
(if they work and work faster than wireless) What is a good one to buy?

I'm in the military and move a lot, so a permanent wired solution isn't an option. I need something that can move easily. Wireless is okay for websurfing, but just not good enough for online gaming.

Thanks.

Just checking the specs -- there's a new "HD" line from Netgear that's faster and also incompatible with the above products. So it'd probably be a mistake to buy the old line products.

http://www.netgear.com/Products/Br [...] ifications

There are some positive reports of DS2. E.g.

http://www.tomsnetworking.com/2006 [...] page8.html

"200 Mb/s" is hype of course -- when the connectors are 10/100 Mb/s ethernet, they obviously can't exceed 100 Mb/s in a single direction.

Even then, I'd agree that 100 Mb/s is likely to be hype in general -- if you get it in your environment, consider yourself lucky.

(Of course, I'd personally run gigabit ethernet wherever possible.)