CMS Wire recent took a look at Technorati's Top 100 blog sites and determined which CMS the sites were using most.  They concluded, not surprisingly, that Wordpress was the most popular CMS with 34% of the top sites using the blogging application.

Simply put, we found that WordPress dominates the list, that Movable Type comes in with a respectable second [16%], and the rest are either custom jobbies or a smattering of other platforms which are, relatively speaking, eating dust.

Probably more interesting, is that full-fledged CMS barely made a dent in the top 100 list.

Wider scope Web CMS technologies are not used much by the top blogs. Drupal scores 5 sites, with Plone used by 1. Other popular Web CMS platforms are conspicuous only by their absence.

CMS Wire isn't saying that CMS are not good for blogging.  I think what CMS Wire is observing is that when users want to only blog...they prefer to keep it simple.  Why use a CMS with more features than they possibly can use when something like Wordpress or Movable Type can do the job?  At least that is what I get from the article.

A couple months ago, Technorati announced that users of Wordpress needed to upgrade to the latest available version (now at Version 2.5). This week, Technorati announced that blogs remaining vulnerable to identified security exploits may no longer be indexed by their service.

Because of this ongoing problem, we're discontinuing processing crawls of blogs that exhibit common symptoms of being compromised. We strongly recommend upgrading your WordPress installation. Even if you haven't been afflicted by a compromise, by the time you are aware that you have been a number of negative consequences may have already occurred (for instance, flagged spam by Technorati, Google or Yahoo!) -- this has been reported by many WordPress users.

By not upgrading your software, the search engine services may block your site from being listed. I can't think of a greater incentive to update your content management software to the latest version than the threat of being delisted. This is a bold move by Technorati. I'm personally glad Technorati is taking a stand against sites hosting older versions of Wordpress with the known security holes. In my opinion, there really isn't a good reason you shouldn't be upgrading your Wordpress site to the latest version.