MQTT - Mosquitto - To control IoT stuff

I'm coming to realise that MQTT is probably the tool I need to get my head around for basic home automation / monitoring.

On reading up a bit here:

Introducing MQTT from Andy Piper

I saw a link to Andy Standford-Clarks ' House that Twitters':

The House That Twitters from andysc

with the audio from the talk at oggcamp here:
http://stanford-clark.com/andysc_oggcamp.mp3


 Less Technical talk by ASC:



Things I want to check out further:
Easyradio
X10 appliance control signalling via mains cables: http://www.x10.com/

Also useful:
http://oliversmith.io/technology/2010/02/26/mqtt-mosquitto-and-php/
(And lots of other stuff from @chemicaloliver )

Idea: AIS - Ship-plotter - Condor??

Further research needed: Websockets.