I have tried to add the functionality to the Wiki Category view widget that comes with the WPMU wiki. The taxonomy for it in the term_taxonomy table is incsub_wiki_category. I basically just took all the coding for the is_category functions and duplicated and changed to is_incsub_wiki_category in aut-anchor-list.php, options.php, mwm-aal-class.php and in the word press file query.php. I can turn the option on and off in the admin panel and all the other pages still work. But I still do not have a anchor list being generated when I look at the wiki category listing.