How can I create a time counter by aggregating a view?
Disclaimer: I'm a total hack with Drupal

I would use the View type of "Table",  then create a views-view-table--VIEWNAME.tpl.php

You'll see that it's set in to a real easy to read loop through the rows.   Modify the HTML structure to suit your needs,  but also add in a simple $var++; and then place that at the end of your rows.