The best I have found is here: http://read.cs.ucla.edu/click/

They seem to have a decent wiki going.

--Jeremy

On Mon, Jan 3, 2011 at 11:44, Daniel Sichel <[log in to unmask]> wrote:
>>Agreed....and while we are talking about it how about hit counters and
> denied packet logs too :)
>>
>>Unfortunately, with NAC using the the click routing system for all
> filtering/routing needs I don't any of these requests being fulfilled in
> the current version.
>>I think a rewrite or custom click elements would need to be added to
> work in these extras.
>
>
> Speaking of the <expletive deleted> click router. Does anybody know
> where there is some GOOD documentation about it? I have needed to
> manipulate the routing table in the click router and would like to know
> more about it. Also, in my rushed and senile brain, I have of course,
> forgotten how I did it before. Any help would be appreciated.
>
> Dan S.
> Ponderosa Telephone
>