With respect to my previous post, here's a link to a little demo. The figure above shows a screenshot. On the left side you see a list of channels, which is a very simple Flex application showing a DataGrid with single column. Out-of-the-box, the Datagrid allows you to change the sort order by clicking on the header. Clicking on a channel results in the playing of that channel in the WMP object displayed on the right side.
I will publish some source fragments later as well.