There is a 750 copy limited edition version of the vinyl coming out. The limited part is an exclusive art print included (I don't think it's signed or anything). Apparently this edition is only available through indie record stores in the UK and EU.
You can find it by Googling for the catalog number: WARPLP249X
For example, here are some retailers:
http://www.roughtrade.com/albums/81573
http://www.piccadillyrecords.com/pro...arp-95909.html
http://www.normanrecords.com/records...someday-world-
http://www.recordstore.co.uk/records...nt/3A840000000