I was pointed to this article http://www.microsofttranslator.com/BV.aspx?ref=Internal&a=http%3a%2f%2fwww.bortzmeyer.org%2fidn-et-phishing.html about IDN and homographs, which points out that most of the fear around IDN and phishing is unfounded.  Seemed like a good reference (thanks, Mark), so I'm forwarding.  (For some reason Mark used a different translation engine though).

Cross-tagged with EAI since the same concerns about homographs and phishing apply to email.