Thanks - that's what I needed to point me in the right direction. Issue is resolved now :)

Ok, figured it out and got the gateway working. The issue is with the RFM69 and the Wiznet Ethernet shield you cannot use pin 10 for the cs on the RFM69. I used pin 7 since I don't use the LED's.
Add the following to your MyConfig.h
#define RF69_SPI_CS 7

and everything should work. Onwards to building the sensors now!

The Ethernet gateway was just too unstable for me and I couldn't get any inclusions. I switched it for a serial gateway and its all working great now. I have a single sensor that is sending data to my House Assistant install.