We are a bit curious about your experiences with the key limit of 100 for the storage API. Especially, we see the accountId as quite a natural key that we can use. However, according to User Privacy Developer Guide those can in theory be 128 characters long. I wonder how others have coped with this - we do use hashes of these right now as we try to be a bit paranoid. I wonder, if the restriciton could be lifted a bit to 200 or 300 characters so that at least two account ids can easily fit into a key.