Enhancing wordpress default gallery similar to facebook/orkut

Backend -Images can be attachments to a single post or multiple posts. -Should be able to add custom fields to images, NOT posts or pages BUT images. -Each image has multiple custom fields, with which they can be filtered and used irrespective of the post/page they were attached to. -Dynamic galleries need to be generated based on the custom field -should be compatible with any theme Frontend - Album similar to facebook - Pop up photo viewer similar to facebook. - Option to go to full screen during slideshow. - comments on the right side similar to facebook. - default wordpress commenting system which can be modified by any plugin. - social sharing option for each images Important: - Each image should have a valid human readable URL. This is similar to default wordpress attachment, where each attached image has unique URL. - Comments should be image specific. Again can be accomplished by default wordpress attachment.