I would say that wordpress is definitely the way for you to go.

I wouldn't touch a hosted blog service if people are liable to visit it as a legit part of their work. My own employer is using an off the shelf filtering service that blocks them by default.

MovableType is a very solid and flexible blogging platform. Their upcoming version 4 will be open source.

Movable Type or Wordpress are the two leaders in the open-source blogging CMS.

I can't comment on Movable Type because I didn't try it... I installed it and failed to make it run because - I am not so sure, may be Bill could confirm - it uses Perl?

So I have played with Wordpress for a month... Wordpress is nice, but I may say it is very slow (especially the admin section). It seems that the newer version is faster because more AJAX has been implemented. The downsides of using Wordpress are that:
A/ You must have a good level in PHP to be able to go deep into plugins and Wordpress code/script.
B/ There is a new version every month or two months... And some old good plugins may fail with the new version, this is why you need to be a PHP Guru.
C/ Too slow and too many global variables. Some of my pages will run 111 SQL queries returning large arrays of global variables. I hate this!

Tomda

thanks all! These look very good, does anyone know of any that are not PHP and linux based?

Any in ASP or .NET?

I don't know of any, but I'm certain Google knows of some.

ASP
[google.com...]

.net
[google.com...]