using something like a wiki as the OS
various wiki used to discuss particular operating systems, or operating systems in general.
Os Wiki is the idea of writing and using an Operating System at the same time by several people over the web. While the idea is not entirely original, for example see the Forth Language and the entire unix family, Wiki Wiki is the perfect metaphor for this idea.
You probably would want to see some kind of Version Management for the code source, which is something some Wiki Wiki Clones offer too. Because the code is supposed to provide some service, it would be good to have Unit Tests and Functional Tests.
Similar goals have been stated a long time before in the Gnu Hurd, www.gnu.org 
. So, maybe an Os Wiki is a way to not only have an OS that can be modified, but to provide an easy to use interface to actually modify it. Naturally it would use a Non Hierarchical File System the Wiki Os filesystem.
Smalltalk Language can definitely be like this, especially if you realize it isn't a language per se, but an environment. Take some existing Smalltalk Wiki and allow embedded Smalltalk commands in the pages. You're pretty much done. That kind of WikiOS would look somewhat like a distributed component network.
The Nomic Game often ends up with lots of work for the one in charge of executing the rules. If rules proposals where given in the form of a function in some programming language, everything would work completely automatically.
-- Peter Schaefer is responsible for creating a messy page like this. Please fix and contribute. :-)
wiki discussing particular operating systems:
Debian wiki wiki.debian.org
...
wiki discussing operating systems in general, and how to program new operating systems: see Operating Systems Implementation .
See original on c2.com