I just wrote about Drupal as a content management system that I recommend. Well, I read on InternetNews this morning that a company called Acquia (acquire ya?) is going to be taking the GPL licensed software to enterprise status, giving it full commercially available support.
Reportedly, they are going to stay as open as possible. [...]

There are a ton of content management systems (CMS) available on the Internet available commercially and freely distributed through open source.
A company I do contract work with here in town utilizes a commercial content management system. The interface is clunky, filled with bugs and is next to impossible to get support for. [...]