I've been dicking around with my templates and seem to have lost a key tag for comments. In a nutshell, the comment form does not appear, which means of course that people can't leave comments on my posts.
The URL in question is http://www.a1great.com/ should anyone wish to take a look.
Where may I find the default, plain-old templates for WordPress? I'm sure I've simply deleted something, and can't find what it might be.