I've read that article at compassdesigns.net and feel its pretty thorough. I'd also say that that jomcomment is by far the most complete solution for commenting. While its not a full blogging tool, combined w/ the joomla content structuring, it makes a fine pair.
Now the folks @
azrul.com do have a complete blogging solution. Its called
MyBlog and includes tagging, integration w/ technorati, and rss feeds.
It seems very well laid out, and aesthetically pleasing, which is a big plus to me. It does cost money, and you get what ya pay for.
You could always integrate WordPress into Joomla, as they do on the joomla developer blogs, and seems to work well. That just never sat well with me.