Just to make all of them clear. What i have understood is that the script tells you which fan page is having the highest likes, which pages are getting the recent likes. But i am not sures how much exact is that information.
I have seen this for free on warez etc.... basically, you put text in the box and it sends it to FB and likes it. Then other ppl can like it. Incidentally... here is a nice tutorial that shows you how to only display content to fans of a page.. i.e. 'like this page to see the best nipples this side of the moscow cheerleading academy'