Do you use blogging software?

Something which cropped up internally over the past couple of days has been a discussion about how many people at Microsoft must have moved on beyond using the standard HTML interface to their blog engine for posting. I kept quiet at this point once discussions got round to all sorts of software I'd never heard of, not wanting to admin that I still use just the basic interface. It works afterall...... On the assumption that my colleagues won't be reading this, for those who blog regularly, do you use any particular software and if so, which one and why? I'm expecially interested to hear from you if the software works with Community Server which is the engine behind blogs.technet.com and also runs under Windows Server 2003.