Well I'm happy to say I've just stumbled upon a fix ~ Annie over at Anniedep has come up with some altered code that makes the gadgets work on Blogger ~ whoot! Here's a link to her posting: http://anniedep.blogspot.com/2012/06/etsy-mini-doesnt-display-in-blogger.html
If you follow the instructions you'll end up with a 2 column, 2 row layout, like the example shown above (only bigger). If you want more inventory to appear you can easily change the numbers in the code. Here's an example of a 2 column, 4 row layout with the modifications explained below..
Remember, be sure to stop by Annie's original post to find out how to install your own Etsy shop number so your inventory will appear.