Who are you guys?
We are a Software Defined Networking startup based in Melbourne, Australia.
Check out the About Us page for more information.

What exactly is SDN?
Software Defined Networking (SDN) actually means different things to different people but in a nutshell it is the separation of the control and data processing functions of a network switch to allow extensibility. Actually Wikipedia has some really good background and basics on SDN. 

I'm looking for an SDN Controller can you recommend one?
There are a number of SDN controllers available list here