There is no associative mapping from item to folder like in Midas; an item lives in one folder. One of the things @cpatrick and I have discussed and want to support is the idea of a "link item" that, at its most abstract, simply contains a URL, but could have a special case perhaps for a link to an existing item in the system if it makes sense to do so. I hope that answers your question. Cloning (i.e. copying) of an item should be supported, but is not yet implemented in the system.