Just found this importer http://sillybean.net/2010/12/import-delicious-bookmarks-as-wordpress-links-or-posts/ and see he’s got both a plugin and theme. And someone has updated his work to go with a custom post type. http://aaron.pk/bookmarks/about/
Not sure if the custom post type will work with adding new bookmarks — I was going to use feedburner to subscribe to the delicious rss feed for new bookmarks. But maybe there’s a way around that. Off to try both versions of the importer and theme and see which works better for my needs!