The Next Stage in Composition -- McIlroy

As far as I can determine, the use of XSL-FO today is limited in the extreme. The sense I get from the several FO mail lists (including XSL-List@lists.mulberrytech.com, http://groups.yahoo.com/group/XSL-FO/, http://forum.java.sun.com/-forum.jsp?forum=34 and www-xsl-fo@w3.org) is that there are few users, and that those few users are either in early testing mode, or undertaking compositionally simple documents, such as forms. I know of a few publishers experimenting with FO pagination. I've seen little mention of cross-media applications.