This months lecture was a little different to the usual. Mal (VK2TMF) brought along a great presentation by Balint Seeber and Matt Robert who discuss what you can do with Software Defined Radio. Balint runs the spench.net website and created the awesome RFMaps tool (currently down.. ).
Whilst your at it here is some other videos by Balint. I liked this one on HR and Software Defined Radio.
and why not check out the Dorkbot Sydney site http://dorkbotsyd.
Big thanks for the lecture idea Mal.