Reported here but no format mentioned. I'm not even sure it is the whole album in 5.1 but just a bonus disc.
http://www.hackettsongs.com/news/newsGeneral37.html
The album will be released in the following formats - Standard CD - EANTCD 1002, Limited and Numbered Vinyl Edition - EANTLP 1002, Limited Edition 2 Disc Deluxe Edition (with hardback cover & 5.1 surround bonus disc) - EANTCD 2002
http://www.hackettsongs.com/news/newsGeneral37.html