Create Social Engine plugin of Amazon Wishlist clone.

For my website I need a Wishlist function similar to the one function on Amazon.com. As my site uses Social Engine software the Wishlist should be develop as a SE plugin. Users should be able to create several gift registries and have the possibility to an 'Add to Wishlist' button installed in their web browser or iPad bookmark. With this button users can add any Items that they want from any website and Friends should be able to view this Wishlist and mark when they have bought an item of the list. An example of Amazon's Wishlist can be found here: [login to view URL] On Amazon the Wishlist or Registry if very detailed, this is not necessary for my site. Prior to development we can discuss in more details which exact functionalities should be copied to the plugin.