sun818 - 11:45 pm on Oct 21, 2006 (gmt 0)
A very rudimentary approach, but you can also append the destination URL in your Froogle feed to indicate the click-through came specifically from Froogle. Something like mywidget.html?froogle . I also append a date to make sure the Froogle feed is working correctly. You should also be aware that there may be false positives as potential buyers post the Froogle link on a forum thread.