RAA - instiki/0.6

Admitted, it's Yet Another Wiki Clone[1], but with a strong focus
on simplicity of installation and running:

Step 1. Download
Step 2. Run "instiki.rb"
Step 3. *Chuckle*... "There's no step three!" (TM)

You're now running a perfectly suitable wiki on port 2500
that'll present you with a textarea for the home page on entering.

Instiki lowers the barriers of interest for when you might consider
using a wiki. It's so simple to get running that you'll find yourself
using it for anything -- taking notes, brainstorming, organizing a
gathering.

Instiki reserves a separate WikiSpace for each port number, so
you can run more than one wiki by keeping them on separate ports.
It also means that you can't access the same wiki on another port
than the one you started it on (unless you move the directory in storage).

Features:
* Regular expression search: Find deep stuff really fast
* Revisions: Follow the changes on every page from birth. Rollback to an earlier rev
* Export to HTML in a zip: Take the entire wiki with you home or for reference
* RSS feeds to track recently revised pages
* Multiple webs: Create separate wikis with their own namespace
* Password-protected webs: Keep it private
* Authors: Each revision is associated with an author, so you can see who changed what
* Reference tracker: Which other pages are pointing to the current?
* Speed: Using Madelein for persistence (all pages are in memory)
* Textile formatting2: By ways of Red Cloth
* Embedded webserver: Through WEBrick