RawWiki is a [suggested] mode of operation wherein the raw text of each wiki page is served up without any markup at all. No links, no formatting, no headers, no footers, no nuttin'.
This would be useful for creating text only documents which could be collaboratively worked upon by the wiki community. These text only documents could be just plain text, or they could even be text for a specific purpose, such as a CSS style sheet. Imagine that, a community designed stylesheet.
Neat, if there's no security risk in that we'll see it RealSoonNow.
MoinMoin example: MoinMoin:FrontPage?action=raw
Compare NakedWiki
Seems already done via MeatBall:raw=1&action=browse&id=RawWiki as described in UseMod:Actions