There is a Guide, actually! The
Guide to Taijitu is descriptions of all the different areas of the forum, many of which have pertinent information about what you can do there. The
Taijitu FAQ will answer many queries you may have about the way the region works, how you can be a part of it, and what goes on here.
The Delegate certainly can appoint himself as a Minister; it's quite legal as far as I can tell. In fact, he would have to if he could not find someone to fill a legally-mandated position. He could also do it for laughs or to obtain another title, but that would be rather self-defeating as the reason Ministers exist is to do the work of the executive branch that the Delegate would otherwise have to take care of personally. It is important to note, however, that the Senate has the authority to remove Ministers from their positions if they have:
violated the Constitution and laws of Taijitu, broken their oath or failed to fulfill their duties
...so a Delegate who gave themselves such a position would have to do their job properly or risk facing a vote of no confidence.
The Important Tai People list is a personal, fun list updated by our resident pandaboy, Algerianbania, and not an official list of everyone who "matters" in our humble community. It is awesome, though.
If you'd like to see it updated, you should contact him by posting in that thread or sending him a message. (Don't fret if it takes a while to get a response; he's been a busy boy lately.)
As for the Wiki, I am clueless. Maybe the Del takes care of updating it, maybe it's a group effort... I never even look at it, to be honest. If anyone else knows, kindly share! That's a good question!