I'm expecting the last pieces of artwork for B/X Essentials: Classes and Equipment this weekend and have been going through the book this evening making a few final tweaks to the layout in preparation. The index of tables is done. Everything is hyperlinked and cross-referenced, ready for the final PDF export.
The wait for the publication of this book should now be pretty short and hopefully bearable.
In the meantime, here's another example spread from the book, featuring the fighter and halfling classes and a wonderful illustration by +Matthew Ray.