The Wall Street Journal has this amusing story about the Faraday cage effect of metal in the walls of older homes: Those of us following Wi-Fi have known about this problem for a decade, although it was less of an issue with 802.11b, which had trouble going farther than a room or two, anyway. Many building materials are problematic: bricks retain water, which absorbs 2.4 GHz signals; thick stonework found in many older European homes are a problem, too.
I must note that this article about chicken wire was written by Geoffrey Fowler. Seriously.
(Chicken wire background by Eln Burgers; used by Creative Commons license.)
U2’s Christopher Lawrence bootleg free to download hereWiGig Alliance Finalizes 7 Gbps Spec for 60 GHz Band
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