Lists:
Lists are the core of SharePoint team services. Although there are many predefined and specialized lists, they are basically all created and administered in the same way. In addition to being able to create your own list, and even import lists using Excel XP, there are 8 default list-types that come predefined in SharePoint. They are:
 

• Document Library
• Survey
• Discussion Board
• Links
• Announcements
• Contacts
• Events
• Tasks

Users:
Users are simply people who are authorized to access the lists within SharePoint. The SharePoint Team Services site administrator will assign different access levels - called roles - to the users. These give users unique permissions within SharePoint. The access levels available by default are:
 

• Administrator - View, add, and change all server content; manage server settings and accounts
• Advanced author - View, add, and change pages, documents, themes, and borders; recalculate hyperlinks.
• Author - View, add, and change pages and documents.
• Contributor - View pages and documents, view and contribute to discussions.
• Browser - View pages and documents.

The site administrator has the ability to add new roles, and to modify or delete existing roles. Note that if the default roles are deleted, there is no way to retrieve them. Even if you don't intend to use the default roles, it's a good idea not to delete them should you choose to use them at a later date.

• View all information
• Upload existing documents
• Edit views and customize lists

Office 2000 users will not be able to do the following:

• Create new documents via the SharePoint site
• Edit existing documents using full SharePoint integration (Meaning that rather than editing the document live via SharePoint, the user must download the document, save it locally, and then re-upload it. Note that this will likely impact revision information that is stored within SharePoint.)
• Import lists from Excel

Don't have any version of office?
Since SharePoint was designed from the ground up to be tightly integrated with Office XP, users without any version of Office will only be able to use the limited set of features that are Browser-based. Note that non-Office files can be stored in the document libraries, and these customers could download, edit, and upload these files assuming they have the appropriate software.

If you've given administrator rights to someone else on your SharePoint site, they can create an new administrative password for you - there's no need to call 724 Hosting.

• You've exhausted all the possibilities that the error page gives you.
• You are running the latest version of Internet Explorer (5.0 or higher).
• You are able to access any pages on the site that do not require authentication.

If you've checked all of these things, then the problem may be that your system is lacking Client for Microsoft Networks in your network control panel.
Open up your Network Control Panel.
In the list of installed network components, you should see Client For Microsoft Networks.
If this client is not installed in the Network Control Panel, you will not be able to authenticate in Microsoft SharePoint.

If you are not experienced in working with the Network Control Panel, check Microsoft's documentation before making any changes. Additionally, if you are on a network, be sure to contact your network administrator as incorrect changes made here can negatively effect your local area network.