Simplest - a host solution like Wordpress.com or Blogger or many others, most of which will let you run on your own domain for a small fee.
How limited is the "simplest" option? I've heard some experienced webmasters recommend this approach for some types of blogs because it relieves a lot of maintenance. The webmasters are experienced enough that I was surprised they recommended the option.
Since you have your own domain, though, I assume that at least your backlinks are portable... you can always go to another host.
Do these hosted options offer enough flexibility to allow any sort of SEO control? How about appearance of the sites? The structural options? How big a compromise do they involve?