There have been some requests to clarify a few things:
Anyone can comment, you simply have to go to the bottom of a given post and click the word "comments" it should pop up a new window that you can write a comment in.
If you are on blogger (not sure if it works off of blogger) you can follow a blog and have it appear in your ´daily reading´ on your blogger account. This may also email posts, but i´m not sure about that.
You can subscribe using an RSS feed, which is latin to me, but apparently it will email you the posts as they happen, or at least a notice that a post has been put up.
Hope that clarifies things,
Keep coming back and spread the word!