Other Facebook pages have a row of little pictures across the top. How can I make that happen on my page?
The example page in the question is a page as opposed to a profile. So, strictly speaking, it is the page layout upgrade that is required to show the pictures, rather than the earlier profile layout upgrade. The page layout upgrade is scheduled to occur for all pages on 10 March 2011, according to Facebook.
It is the new profile feature which Facebook is rolling out. Read more about it on Facebook's blog