If you are a facebook fan page administrator, then you will profit by extra information facebook is providing to every fan page from now on:
Facebook Insights.
The insights give you information on the number of impressions of a specific post (but do not give you an answer to whether the post was actually read or not) and the number of feedback related to the impressions. The numbers are shown under every post.
Here’s an example:

A small feature that gives you the possibility to get a handle on what topics your fans want to read about and what they find rather boring.
Very helpful for the evaluation of fan pages and their strategies. This is one of the changes we like, facebook!
If you want to know more about Facebook Insights, click here.
/Sylvia

