Yes, the A380 is back in service.
The service ceiling for an Airbus A380 is 43,000 ft (13,106 metres).
Yes
The A380 has a service maximum of 43,000 ft.
52 A380's have been delivered or are in service in 2011
It already is.
As of July 2011 52 are in service.
China Southern
The A380 made its maiden flight on 27 April 2005 and entered initial commercial service in October 2007
The 'service ceiling ' is 43,097 feet.
101 built as of March 2013
35,000ft (A380-800, initial cruise altitude). The service ceiling (maximum altitude) of this aircraft is 43,000 ft.
The maiden flight of the Airbus A380 was 27-Apr-2005. It entered service with Singapore Airlines on 25-Oct-2007.