According to spiegel.de (which is usually well informed), the test evacuation of the A380 will be held on Sunday: not sure where, though, the article is not clear about this.
http://www.spiegel.de/spiegel/0,1518,406679,00.html
Could not confirm this info with anything else on the internet, but if it is true, more information will appear all over in the days to come.
The serial number of the test aircraft is 007...