In wiki, we often interact with pages by draggin and dropping a page-flag from one page to another. We have extended this to allow the fropping of arbitrary urls from the browser url bar, or from html links on other sites, and dropping these onto a transporter.
The Imagine Transport and now the Magic Transport are tools that provide areas for accepting such drops, and we imagine future interfaces and versions of wiki generalising this behavior so that drops can occor on any element of a wiki page (aka Guide).