It's a shame that most of the replies so far seem to be in response to the title rather than the content of the node. There have been many discussions in the past about creating additional levels above saint, but that's not what stefan_k is suggesting!
Let's go back and read stefan_k's node again... He's actually suggesting adding new features to the existing levels. First, when you advance a level, you would get a page congratulating you on reaching a new level, with links to your new level powers (if any) and other useful nodes. The other suggestion is to add some fun, but not necessarily useful, level powers, just to make the Monastery more fun.
I think the first suggestion is definitely a good idea. Besides rewarding someone for their participation in the site, it would also highlight useful information such as level powers, which is often difficult to find. The second suggestion sounds fun, but might require a lot of effort. :)