instiki runs fine on maemo. I used the ruby packages from scottishclimbs for chinook. Ruby porting seems to have stalled for maemo, but these files still seem to work fine.

Instiki is a great wiki, and I can recommend it. I like how it makes it easy to set up multiple wikis and then select which wiki you want from the main http://localhost:2500 page. The maruku implementation of markdown should have enough syntax features for most people. Out of the box, instiki also makes it easy to download a zip of linked html pages of your wiki (as well as a zip of the source for individual pages).

However, I've become enamored with the feature completeness and syntax of restructured text, which is why I use moinmoin more -- although lately, I've been experimenting with sphinx (http://sphinx.pocoo.org) which builds really nice searchable static web pages (and pdf) from collections of restructured text files. Sphinx is used for the python documentation. I haven't tried Sphinx on the tablet, but building html files looks like it ought to work.