Unfortunately, it's not really possible. Imagine that the all the articles are like index cards in a box (in PM speak, these are called 'nodes') Each card has a title, and owner, and some bit of data associated with it. There are just under 28,000 nodes. Now, somehow you'd like to provide a master index that contains the title of each of these cards. I'm sure you begin to see the problem.
There's also not necessarily a completely logical layout to the nodes. Some are threads, or followups of others nodes, some are just little free standing things out there in space. To provide a comprehensive index would be quite an undertaking, since categorizing them would take a lot of work.
There is the Seach box, at the top of the screen. You can also type 'Super Search' in the Search box, and you'll be taken to a node (cool, eh? Nodes can contain data, programs, all sorts of stuff) that will allow you to search by keywords.
The whole search and origanization topic is something that has come up a number of times. It seems there's really no super-cool solution that just presents itself. But if you have any good ideas, by all means, post them.
Oh, and the things like Best Nodes and Worst Nodes aren't based on your priviledge. There are nodes that are, but you'll not run across them in the normal browsing of the monastery. If you do (like by typing certain words in the Search box), you'll get a message like 'You don't have access to that node. Tough beans.'
I didn't mean to over-simplify the problem, and insult your intelligence, but I didn't know how familiar you are with PM, the way it's implemented, etc. If so, I apologize. Hope this clarified it a little for you.
--Chris
e-mail jcwren