I am no longer hoping for a LaTeX3 manual to be published and believe the whole subject of TeX, LaTeX2, LaTeX3, PGF/TikZ and other graphics platforms is too vast and volatile to fit into a single programmer's reference. While there are some who have sufficient knowledge and experience to write such a reference, who could hope to write one for profit, and who would have the patience and resources to write one for none? LaTeX2 is well documented through the "Companion" and a host of tutorials, some of them excellent, and LaTeX3 through expl3, interface3 and xparse, documents no longer as impenetrable as they once seemed. With the focus on productively using LaTeX, what one needs to do is tunnel one's way through interface3 (mainly) and document the experience by way of hands-on examples - eventually a "cookbook" may emerge. My revised slogan therefore is: a kingdom for a LaTeX3 cookbook! The benefit of that approach is that I can start work on one on my own.

And that's my profile as far as LaTeX is concerned.

Turns out to be a longer haul than expected, but I am getting there.