Daring avatars have provided us with a visual example of a Seance, which I am interested to see, though I do not think this is the best advertisement - it manages to appear simultaneously boring and a bit scary. In a circle of friends, two manage to say anything, and there is no connection between the Audible Part and anything that one can see. Otherworldly Voices come seemingly out of nowhere, as might be expected of them, and say little of interest. A much more detailed vocal explanation can be seen here.
Still. I'm sure we will be seeing a wide array of cinematography soon. Personally, I prefer to have a glass moving around on a table for my communications with other worlds; the traditional way.
With all that in mind, I would mention that the next version of the Twitterbox possesses functions to automatically include a SLurl to one's current location if one says the word "SLURL". There are also moves afoot to include a social service, inviting anyone within twenty metres to become your friend. I am not sure that this is desirable, all told, and may remove it.