According to their web site, the book was apparently too slim - below the 64 page limit required by SubPress's printer. To bring the piece up to the required page count, Subterranean are to include the original Ashbless interview - previously destined only to appear in the 250 signed limited copies - in all copies of their trade edition too. This is good news for most Powers/Blaylock/Ashbless fans who will, I am sure, be glad to get the chance to see this piece, but those collectors who paid extra for the more expensive, limited edition thinking they were getting an exclusive, might well feel out of sorts. The Subterranean announcement adds "The limited edition will still be the only signed edition of this book."
You can order a copy of the trade edition via this direct link to Amazon.com.