There are a few reasons why you might not see posts on this friends page:

• lets find out... might have no friends defined. If you are lets find out..., you can edit your Blurty friends so they show up here.
• lets find out... might have friends defined, but all of their friend's posts might be over two weeks old (according to the times on our servers), and thus wouldn't be displayed here.
• lets find out... might have friends defined that post only protected entries that you can't view, because they haven't defined you as a friend in return.