Comlist Plugin shows commented pages, polls etc.
You can use it to generate last commented pages/polls/etc. list, most commented pages/polls/etc. list and so on.
As a Pagelist Plugin, Comlist is available via {PHP|comlist} callback from TPL file with the following settings:
$tpl - Template code (TPL file name without ".php" at the end)
$items - Number of items to show. 0 - all items
$order - Sorting order (SQL)
$condition - Custom selection filter (SQL)
$area - Custom comments areas list...