After many hours between yesterday and today, merging fixes by axold, pingus and some from myself, I can say that AulaWiki 1.6.2+ is back working on Tiki stable (2.2 right now, but also on 3.0 as of today ).
Untill mods.tw.o becomes updated with 1.6.2 (and not just 1.6), you can install it directly from the mods repository from this server.
Thus, set in your tiki,
Mods remote server: http://edu.tikiwiki.org/mods
And install it from here.
Known issues are (so far) just theme related issues: adapting the .css and .tpl top be fully displaying AulaWiki resources in the right place, etc.