Python 2.7 Hello World with AppEngine and Jinja2

I want to develop a project using Google AppEngine, Python 2.7, and Jinja2 templates. I am using Ubuntu 11.10. I have installed the Aptana Studio 3 (formerly known as PyDev, I think), Appengine, Python 2.7, and Jinja2. At [login to view URL], there is example code, ending with use of a jinja2 template at [login to view URL] I want this "hello world" example to work via a project in Aptana Studio 3 (free download at [login to view URL]). Get that working yourself, then screen-share with me to fix my configuration. It is giving me fits!