Any advances on John Resig's "JavaScript Micro-Templating"?

You can definitely purchase the pdf online when it comes out as @James points out, regardless of your country of residence.

is there a more stable/advanced version of this Micro-templating engine by John Resig?

See Rick Stahl's blog (on a bunch of clientside template engines) where he fixes an issue with single quotes in Resig's Micro-Templating engine. That's about the only improvement to the source I've seen.

Also see jQote2. I'll quote from the site itself:

jQote (pronounced like Star Trek’s Chakotey) is basically a rewrite of John Resig’s awesome JavaScript Micro-Templating utility. I took his code and ported it to jQuery, overhauled the parsing / conversion part and extended it’s functionality to minimize everyone’s coding efforts.

Take a look at the jQuery plugin

https://github.com/vkiryukhin/vkTemplate ,

which is built on the John Resig's Micro-Templating engine. A "single quote" issue is fixed and engine is slightly simplified according plugin's architecture.

Demo and documentation at http://www.eslinstructor.net/vktemplate/