I found the list here:
http://www.sflow.org/products/collectors.php
But was wondering if there are open source projects like Zenoss or others that can do SFlow collection and reporting for more than a 24 hour time period?
I did see that Zenoss has partnered with someone for a free one and will test that one out but wondered if there were any others out there that had some decent graphical views and maps and weren't impossible to setup.