[ILUG] web logging/forum software

[Paul Reilly]

Anyone know of anything like this?

I'm looking for some kind of web logging system, which acts
a bit like a forum and a bit like a mailing list, and a bit like
a request tracker/ticket system.

* Users should be able to create their own topics.
* Users should be able to update topics by web, or email (direct
  email input to specified topic)
* all updates should archived on web, for later perusal
* any updates to a topic should be emailed to those subscribed to
  the topic.

So it's a bit like a tracking system, but without the topic status
aspect. It's a bit like a weblog but with email interface to it.
I could probably hack something together in php, but I'm wondering
if anything like this exists already.

Failing that, does anyone know which free forum packages, have
email functionality? PHPbb doesn't do the business.

Thanks,
Paul