Because WordPress is so poor at handling file uploads (AND because the new WP versions introduced incompatibilities somewhere that make some of the original blog pages 404 even though they are in the WordPress folder), I’ve created a SourceForge project for this (http://javanioserver.sourceforge.net/), and uploaded all the files there.
For those of you who wanted the source recently, there’s links to the downoad page from the SF page – the three files marked “version 1.0.0” are *precisely* the same ones I originally uploaded to the blog post.
If I get time, I’ll check the source in to the SF SVN too, so you can check it out directly (and upload any modifications you make).