Hey everyone,
Here is a quick example I threw that shows how to highlight a column in the datagrid when you select a header. You can download the source here: http://www.kirupa.com/developer/flash8/code/VerticalColumn.zip
Here is a screenshot of how this looks:
I will write some more information about this later in a blog post, but I hope to find some time to write a tutorial outlining how to use the CellRenderer 
Cheers!
Kirupa 
