Got the first sample documents from the IALLT folks. First off, I went through the previous edition they sent (which I also happen to have in hard copy), and got confirmation of a number of details with regard to layout, running titles etc. (see the email correspondence for details). Next, I started doing the markup, beginning with the header and then going on to the reference list. As I come across each specific type of reference, I'm documenting it by example, and also writing the XSLT template(s) needed to get it into XHTML. This will be a long slow process, but it should give us a very flexible system in the end. So far I've done only journal articles.