Re: Directory
Actually the directory is on the endangered list of Tiki features. For one thing, the trend in Tiki's development has been to try to do more things with a common core of code rather than to try to maintain specialized features and their unique code. That is, the idea would be to do a sites directory with wiki pages and categories rather than having a standalone directory feature. (Similarly for FAQs and maybe other "minor features". ) Then if any feature detail is missing, it could be added to the wiki/categories code and shared by other features of the package. I don't know if "identify dead external links" could be easily coded, but clearly that would be useful for wiki pages and other parts of Tiki, so it's something to keep in mind.
Part of decision about this has been the decline in the general popularity and use of website directories, replaced by search and social networking recommendations, etc. And in the case of the directory at this site, it seems its negatives have outweighed the positives, in terms of maintenance time and suspected use of the directory by script kiddies to find Tiki sites to vandalize.
So the upshot is Tiki's directory feature won't be getting any improvements, and actually will be removed at some point (maybe by Tiki 15), but hopefully its functions will be replicable.
-- Gary