Making the node title hidden, by having an option in the node edit form. I think this is pretty important. I use this in Google Sites all the time, but haven't found a module for this in Drupal, yet. The title still needs to be accessible for other modules, forms, UI elements, and SEO that use a title.
It would be a very simple module that would hide the title via a stylesheet. However, it lets the author decide whether or not the title should be visible. This way, you still have to set the title, but it can be optionally displayed on the page.
It would also be important to have this option turned on/off when configuring the content type.