Recently I have come across some nice interactions whilst online shopping.
The 'Oasis Fitting Room' allows you to trial outfits before you buy and get your friends advice before you purchase.
As well as this, Topshop have just added a new function to some of their clothing previews. When viewing some of their shoes, you now have the option of moving the mouse to see the desired shoe from all angles. This is a step forward from just zooming into the object or selecting a back view perspective.
I can see these programming applications such as flash becoming a more common occurrence in our online shopping experiences.