Edited to add: Several of you are looking for this tutorial on SCS. I am sorry my link didn't work. I orginally linked to the category "swing" cards in Resources. But what I did here is really a "spin off" of both the swing (fliip flop) card and the swinging z-fold card. I am going to post my tutorial here on this card in the next couple of days. Thank You for your lovely comments! (5-14-12)
and here it is with the card unfolded. The heart twists and turns as you open the card!
Find more inspiration at the Serendipity Stamps Blog and the DT: