Per Marc/Avery's announcement on 3 June, it's been pushed back to 'mid-July' which presumably actually means 'late July or early August.' Although he didn't say so, I get the impression that the delay is due to some unexpected difficulty in getting good full-color reproductions of the various game component facsimiles which will be included in the book -- something which the previous volumes didn't have to worry about.
In summary, I'm sure FFE005 hasn't been forgotten about, I'm sure Marc Miller is doing everything in his power to get it out as soon as possible (which, at this point, probably isn't much more than hassling the printers), and I'm sure that when it does show up we'll all agree that it was worth the wait.
(And on a positive closing note, since FFE006+ won't have this issue with the color-inserts, hopefully we'll be able to see them in a more timely fashion!)
[This message has been edited by T. Foster (edited 12 July 2001).]