[rt-users] public knowledge base interface (repost, sorry)

[trasko]

(sorry for the repost, this got stuck in another thread due to 
"in-reply-to" headers)
RT-users:

In our current home-brew ticketing system we make the correspondences of 
our previous tickets available to the public through a simple search 
interface on our home page.  If a customer does not wish their ticket to 
be publicly accessible we can mark it as "private" and it will not be 
included in the search results.

I am looking to replicate or improve upon this with RT.  The 
public/private status can be handled by a custom field, but does anyone 
have a good idea of how to allow public (non-authenticated) access to 
past tickets on a per-queue, searchable basis?  The simpler the better.
Thanks.