Can I remove the password protection from my SharePoint™ Services 2.0 site
From mail2web.com Wiki
You can change the access level of your SharePoint 2.0 website so that anyone can view your site. To change the setting, browse to your SharePoint site and log in as an administrator. Then click on Site Settings, Go to site Administration and then Manage Anonymous Access. By default, your site is set so that anonymous users can access Nothing. If you want visitors to your site to be able to browse without having to enter any password, you can change the setting to Entire Web Site or Lists and Libraries.