I have set up several small businesses with Wordpress. In addition to being a great blogging platform, it can be used as a more traditional-style website.
Personal Bookmarks
Here is a collection of plugins to turn a Wordpress blog into a personal bookmarking site. You can see my version of this running at links.aaron.pk.
Twenty Links
A theme designed to look like delicious and optimized for saving bookmarks. Theme by Stephanie Leary, and I updated it to use the custom bookmark post type. See a demo at links.aaron.pk.
Bookmarks Post Type
A custom post type for storing bookmarks. Includes a custom field for storing the link URL.
Delicious XML Importer
Import your Delicious XML file into WordPress as posts, links, or bookmarks (using the custom post type above). Based heavily on the WordPress XML importer, written by Guillermo Moreno, Stephanie Leary and updated to use the custom post type.
Delicious XML Exporter
Export your bookmarks from delicious.com using my Delicious XML Importer.
Wordpress IRC Notifications
Receive notifications to an IRC channel when posts are published or comments are posted. Use this with the MediaWiki RecentChanges IRC Bot. Download the plugin from github.