Disclaimer: I've never actually flown on an A380, but I would like to! But I'm trying to be helpful, so...
Found the page
http://www.qantas.com.au/travel/airl...ions/global/en which indicates that
PC power is available in First, Business and Premium Economy on selected international B747-400 and in Business on all international A330-300 aircraft. This system provides 110V AC (60 Hz) power and accepts most household power plugs including: Australian 2 or 3 pin, European 2 pin, Japanese 2 or 3 pin and USA 2 or 3 pin. Customers using UK 2 or 3 pin plugs need to use an adaptor.
PC power is available on all A380 aircraft in First, Business and shared in Premium Economy and Economy.
Also this page below has an image of a power socket from an A388 which seems to match up with the description above.
http://www.flyertalk.com/forum/21181812-post10.html
Hope this helps and have a good flight!