Here's a cool little find for those of you who also have Etsy Shops: the Heart-O-Matic at CraftCult.com!
Just got to the site (http://craftcult.com/heartomatic.php), type your Etsy user name in the box, click Enter and presto! You get some great reports on who has added your shop or items in your shop to their favorites...
TIP: If you bookmark the page after entering your user ID, you don't have to retype the information each time you access the Heart-O-Matic. For reference, the URL you bookmark should look something like this: http://www.craftcult.com/heartomatic.php?userid=theitsybitsyspider