So far, I don't know that Brady Games is coming out with a new one, at ALL, much less when you'll see a UK release. I'm keeping my eye on things, because I want a new guide, too.
Though I'm pretty sure they didn't cover the Zilart missions on purpose. All the job information for the new jobs that came out in Zilart are there (at least, as of April 04). However, by the time you get to Zilart, you ought to be able to find out what you're doing on quests on your own, or have friends who can guide you.
The FFXI atlas doesn't have maps for certain areas, like the Temple of Uggapleaseshootme, or sky.
It's a strategy guide, not a complete exposition of every map, object, and task you could possibly encounter in the whole game. But, yes, I'd like it to have at least an update on the new gear, areas, and recipes.