tedster - 11:05 pm on Oct 21, 2010 (gmt 0)
That's quite an article. At the end they say "We realize this can be a little complicated". That's for sure!
Given how even relatively simple things sometimes seem to confuse Google rankings, I don't know that I'd be comfortable using that maze of rel="canonical', rel="alternate", 301 redirect, user preference cookies plus an hreflang attribute.