Last Thursday at 11:00 there was an excellent example of the flash mob form in Liverpool Street train station in London where most of the concourse starting dancing.  I am calling it an "example of the form" because it was actually organised by T-Mobile, but aside from that it had all the hallmarks: A group of people who turn up, do something, melt away afterwards, and most important of all; the general public knows nothing about it.

A couple of my friends are into steam punk, and I have just seen what I am sure they would regard as a wonderful birthday or Christmas present: HD3 Complication's Bi-Axial.

Just stumbled across this... excellent.
(actually this is a re-post for testing purposes)