The process is simple: register for an account, choose your charity and start shopping!
You can also search for products and do a price comparison directly on Ziggedy or creating your wish list (called boards). Our search result isn't the best right now, but we're working hard to improve it. Bonus: if someone buy an item from one of your lists, and have no interest in helping any charity of their own, we will donate instead to your (the poster's) charity!
I'm one of the developers at Ziggedy. We've love to see what you guys think about our site!
I can see that like Smile you can donate to pretty much every registered charity. I also assume the donations are made in Ziggedy's name?
Other than that, I love this kind of thing. It makes donations easier, it kind of makes it so you don't have any excuses not to use the service. :)
However, if the charity want to claim an accout on Ziggedy and see who's helping with the donations, they will be able to do that too.