Yes we are talking about different things.
eDirectory is Novel Netware's central database supporting all of its servers, users and workststions - somewhat like Windows Server Active Directory. eDirectory is awesome for massive organizations with 250,000+ users to support, and global in scale. This: http://www.novell.com/products/edirectory/
is the eDirectory I thought you were talking about.
What you are looking at appears to be more like an advanced CMS or a content management system. They appear to link their components into any site they create, and charge a monthly charge for rental of their software. Depending on what you want to do with it, there are many free CMS systems available for use; PHPNuke has been around forever, Joomla is a newer one that looks promising, Wordpress etc. These CMS systems may provide you with what you are looking to do.
If you are looking to create a custom CMS system specialized for you, you will be looking at $500 - $7000 depending on you're requirements and commerce usage.
Oh yes, don't forget that Google has searches and maps that can be combined into you're own site code. This lets you save the work by giving it to google to handle. A lot of what eDirectory.com has is localized searching and member services. Between a free CMS and you're own creations you can probably emulate a lot of what it does (though definitely not everything)