I am going to keep some of my notes and ideas here:

Things not really ready for the main pages, but that may also be of some interest to others. They also may still be half baked which is why they are here and not ready for the main pages :)~

html vs. xhtml Most of the examples and code seem to be 4.01 transistional. Unlike a pages authored in html, new html can be regenerated at any time when the wiki rendered changes. For now I would prefer html
and not xml <br /> ( a byte is a byte, and my pages are html not xhtml), what is a good way for me to get this, and others get the <br /> they may prefer?

action/diff -- which is prefered ? this or the gnu diff one? the gnu diff just uses tempnam()? Perhaps the name should be based on what page and version it is diffing and then these can serve as a cache also, and speed diffs up on a very busy wiki? Otherwise maybe we can use popen to talk to the diff and the overhead of temp files completly? Diff also seems to ignore if the moduels to store prereendered pages is being used.