This was also seen at SIGGRAPH 2009.

After spending several hours searching for which airports are using full body scanners and what the rules are, the list below details my results. The fact is, most airport websites are useless when giving the information. Schiphol airport has a nice brochure outlining what they’re doing, but most of the information I found comes from various news sites.  Many EU states appear to be waiting for a concise response from the EU Parliament and then issue a united answer.

It appears that nearly everyone is thinking of or already has installed full body scanners. The differences is the type of scanner and whether it’s compulsory or not. Nearly all countries state that they are only doing this on flights to the United States.

The United States has also installed full body scanners at most of their major airports, though, under US law, everyone is supposed to have the option of a pat down as well.

Australia – body scanners will be introduced by early 2011
Belgium – waiting for EU decision
Canada – all airports to get scanners, in Vancouver, US bound passengers are to be targeted first, but have the option of a pat down; suspicious domestic or international travelers will be required to have a full body scan Winnipeg also offers the option of a pat down
China – hasn’t ruled them out, hasn’t decided whether to use them or not
France Charles de Gaulle airport – passengers may request a manual check
Germany – summer 2010 will begin testing
Ireland – seem to be still debating on whether they even want scanners, cost appears to be an issue; nothing noted on the Dublin airport website
Italy – all passengers traveling to the United States would be scanned.  I could not find if this is mandatory or not.
Japan – still deciding if they want them
The Netherlands – at Schiphol you can choose a body scan or pat down. You can download a pdf brochure from Schiphol outlining the details
Nigeria – will be installing them; From the tone of the article, I’d guess they’d be compulsory when it happens.
Russia – body scanners in use in Moscow since 2007, can request a pat down
South Africa – not considering full body scanners at this time
Spain – waiting for EU decision
United Kingdom – all airports mandatory or you do not fly