For example, view-source at Joel Spolsky\'s public career profile
The key is in the script's type attribute. By setting it to type="text/html" it doesn't get run by the browser's JavaScript engine. Instead it is used for other things, such as templating. This example appears to be using these tags for templates.
Check out this MIX 2011 webcast that shows how something similar is used in Knockout.js:
http://channel9.msdn.com/events/mix/mix11/FRM08