This is iBlack, a theme for Tumblr by Marco van Hylckama Vlieg.
- Pretty rendering for:
- Photos (cool text overlay)
- Sidebar menu to which you can easily add items to link to other sites.
- Built-in tag cloud at the bottom of the page
You can easily add items to the menu below the search box by adding list items in the source code of the theme. You can also change the tagline in the header section.