This blog entry contains a standard widgetbox DIV to place the widget and an extra A tag to define the tag. The tag is "hoff" which tells Space Browse to search for a virtual tour that contains the word "hoff". Here's the HTML:
<div class="wbx-widget" id="f3a39c0a-cbf9-4c51-92fa-d1cf6abfe54f"></div>
<a rel="wbx-keywords" title="hoff"></a>
You should always see the virtual tour called "Rock climbing at The Hoff" here.
Here's the widgetbox docs for tags: