A Japanese video is available on YouTube showing the severe radio interference that's caused by devices that use the mains electricity supply for broadband internet connections.
The video was made in May 2007 at the West Japan Ham Fair and can be seen below:
Data over Mains Radio Interference http://www.southgatearc.org/news/august2008/
data_over_mains.htm
UKQRM website
http://www.mikeandsniffy.co.uk/UKQRM/
UKQRM Yahoo Group
http://tech.groups.yahoo.com/group/UKQRM/
