Bullets above the columns
Since v 1.3.6 Column & Bar chart can display bullets (images) above the columns (or next to bars). Here is an example:
http://www.amcharts.com/column/images-above-the-columns/
This is done using "bullet" syntax:
<value xid="0" color="#7F8DA9" bullet="0.gif">12999</value>
This allows you to display logos or any other image/animated SWF file above the columns.