This feature is to make sure that huge long posts don't take up too much room on this front page.
Basically I just enclose some of my blog posting with a
<div> tag which gets shown and hidden as required by the link below.
The cool little feature is that the link will be removed if I haven't included the appropriately classed div tag in the post. This means that short posts will display as they always have.
The next step might be some look and feel updates...