We are registered at Macys so far, with Bed Bath and Beyond and Crate and Barrel to come soon. HOWEVER, I am working on a brand new site that allows you to register for anything, from any store-and we have found a lot of what we registered for at Macys is much cheaper at Sams and/or Costco-at least for the kitchen appliances.
An interesting article on CNN about the rise in "Honeymoon Registries" and how they are no longer against traditional etiquette. http://www.cnn.com/2011/TRAVEL/06/10/honeymoon.travel.registries/index.html?hpt=hp_c2
At first it seemed very strange to us to do a registry for our honeymoon vacation. After reading about them in every wedding magazine, and seeing that even Martha Stewart approves of them, we decided to do one. Its our "dream honeymoon", and we cannot wait to embark on the Allure of the Seas!
Registry Stop puts all your registries on ONE page and allows you to register for things at stores that dont offer registries themselves, such as Home Depot, Sams, and Costco. I just started working on this, and it is quite a task to sync everything-I am hoping to have it done soon! The registries for Bed, Bath and Beyond, Target, Macys, and a couple items from Sams and Costco are all on this site. It tells you where to find the best price for each item.
The Macys registry is included on the RegistryStop, but here it is separated as well.