I've just seen FFG's little news feed about this, up there ^ somewhere.
http://www.fantasyflightgames.com/edge_news.asp?eidn=3544
I haven't got The Lathe Worlds, but I had a look and the additional of special origins for all the Ad Mech territories in the Sector fills my completest heart with a warmth.
Also got some nice additional tech, nice to see a couple of RT goodies and some classic 40K tech.
