ruby wiki reccomendation

[Ara.T.Howard]

i've used a few of the ruby wiki's in the past and liked them. however, i'm
now in the process of putting up a wiki that will be very public and have a
limited number of potential posters - basically memebers of several small
groups. i also need file upload as a feature. in order to prevent dos
attacks and spam, and because my posters will be from limited groups, i need
some sort of site-wide built-in authentication scheme that will allow only
certain groups to edit certain pages. currently moin-moin is at the top of my
list since is supports these features out of the box and seems well put
together - but it's in python and this wiki will have a ruby focus! i'd love
to use a ruby wiki for this but don't think any of the current crop support
the features i need. can anyone out there reccomend a ruby wiki that does?

kind regards.

-a
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[Douglas Livingstone]

Exactly what I'm looking for too:

A ruby wiki with file/image managment and user authentication.

I've only wanted one since this morning though, so I've not put any
effort into it yet

Douglas