BoxedUp is a wish list creation site that lets you add items that you would like, as well as items you already have.
There is a bookmarking tool that you can download so that items can be easily added to your BoxedUp wish list. You can also import your Amazon wishlist directly. On the site, you can search individual products that users have added, and search shops that the individual products have been added from. For each item, there's a link to see other users that have added the same item to their wishlist as well. Viewing another user's profile will show their wishlists. You can add users as friends, and then place their items on reserve, meaning you'd like to buy it for them.
While you can add others' items to your list, there's no way to take an entire list of another user. There's also widget tools for you to add your wishlist to your blog or personal website. BoxedUp currently supports MySpace, Blogger, hi5, TypePad, Wordpress, Tagworld, Friendster, Xanga and Piczo. There is also an option to create a more customized widget. This would be a good service to include reviews along with wishlist items, and add comments as well.