I've been working on smaller PDF only stuff that should release when Worlds Apart comes out. Since I've decided to release a non-art version for free, I'm trying to have some $2 PDF expansions out there to entice some people into forking over their hard-earned cash even if they only get the non-art version of the Worlds Apart core book (which is 96 pages, btw). :-)
So far I have a three PDFs done and am working the 4th. I hope to have 6 or 7 by the time Worlds Apart comes out in August or September, 2012.