I have added a widget to the side bar and a page with a form to subscribe to this blog. After you subscribe, you will receive an e-mail when a post is published. You can also chose a specific subject if you like, but as this is at the moment a low traffic blog, I suggest that you subscribe to all subjects. You can access the subscription form from the menu bar.

(The current version is a bit buggy in that each time a post is edited and updated a new e-mail is sent immediately. I will try to solve this soon.)