Are you interested in starting a blog but don't know which service or software to use? First decide which features are important to you, then look at the new side-by-side comparison chart at http://www.ojr.org/ojr/images/blog_software_comparison.cfm
By the way, the article you are reading right now is hosted on TypePad Pro.
I did find a couple of minor errors on the chart. It claims that TypePad does not have "Visitor registration/login" or "moderation." In fact, it has both. I have enabled Visitor registration/login on my blogs. You can verify that by attempting to post a comment to an article here, you will be prompted for your registration/login.