When you click on one of the # links on a stream page, it takes you to that section of the archive page for the day, with the item whose # you clicked on highlighted.
Now it also sets the title of the page with the text of the item.
If you use a linkblogging tool to point to this, it will automatically be populated with the correct text for pointing to the article. We even add the square brackets so it will be correctly linked if the linkblogging tool is Fargo.
I love to sharpen the edges products to this level of detail. It takes time to figure out where they need adjusting, but we've already been using the stream type for a couple of months.