[ubuntu-uk] Web forum software for Ubuntu (Edgy server) - recommendations wanted

[Mark Harrison]

Hi all,

I'm looking for some "web forum" software to run on Edgy. Can you 
recommend me something?

My requirements (in order of importance, most important first) are:

- Free as in beer
- Free as in speech (I might need to write a username registration 
handler at some point)
- Has a backend that can live in PHP 5
- Has a backend that can run on a different server from the front-end, 
and cope with multiple webheads
- Has an admin model that allows me to authorise a few other people to 
be "user admins" to weed out the obvious SPAM
- Ideally, an anti-spam plugin (also free) that "sort of works like 
Askimet" :-)


And please note that, yes, I really mean forums, not 
mailing-list-server. Normally I hate web-only forums, but this 
particular job has a customer base who are actually calling for them.

M.