There are 3 approaches to Content Management Systems (CMS):

Content Management or "Portal" System

Browser-based web page editor

Macromedia's contribute tool

Content Management Systems:

Mambo or Joomla derived CMS using PHP and MySQL

DotNetNuke using ASP.NET technology.

Both of these run on our hybrid hosting platform: TheHostingService.com.

These convert your site to a completely database driven web site.

You have to rework the layout of the site and the menus to conform to the features of the CMS system. The site is 'slow' because all pages are being stored in, and displayed from, a database.

Contribute:

The alternative is to install a Web page editor on your computer. The Contribute product (from Macromedia, the same people who make dreamweaver), is modestly priced.

Contribute allows staff to edit portions of the web page that the designer designates using Dreamweaver.

Contribute is a much easier tool to use than Dreamweaver.

See http://www.macromedia.com/software
/contribute

Web-based Page-Editors

If all you need is a simple system where you can edit parts of certain existing web pages, remotely, using just your web browser (instead of having to learn a daunting package like Dreamweaver).

These web based systems include the ability to login to different levels of edit-ability for full page editing or partial page editing.

Perhaps there is no need to replace and re-vamp your whole site to fit the structures imposed by a full content-management system?

If so, please take a look at these products, starting with the simplest, low cost product:

Tiny edit: http://www.tinyedit.com/index.php
(click on the demo or flash presentation)

More sophisticated (and more expensive) products:

http://www.interspire.com/webedit

http://www.eschelbacher.com/cms/
cms_intro.php

http://webword.biz/cms/index.php