> I am not sure if there is a better place to ask (please tell me if
> there is).

The instiki.org wiki has few pages for asking questions and getting 
answers, such as the FAQ, Random Discussions, Bug Reports, etc.

> On my instiki (0.9.1) pages I have links at the bottom that look like:
>
> Views: Print |TeX |PDF
>
> How can I disable the TeX/PDF button or add new ones?

You can't, right now. If you have pdftex and is running Textile, then 
they're forced on there. That is unless you just remove the links from 
app/views/wiki/page.rhtml.
--
David Heinemeier Hansson,
http://www.instiki.org/      -- A No-Step-Three Wiki in Ruby
http://www.basecamphq.com/   -- Web-based Project Management
http://www.loudthinking.com/ -- Broadcasting Brain
http://www.nextangle.com/    -- Development & Consulting Services