I am able to send pings over the nRF24 interface using the custom protocol.  The code right now is just a proof of concept, and can be considered in the pre-alpha stage.  However I do plan on releasing it soon on Git-hub, as soon as I can clean it up a bit.   In the video the top two windows are connected to the first raspberry pi, and the bottom two windows are connected to the second raspberry pi.  The windows on the left show the debug output from the nRF24 link.

Jump to 1:27 to see the good part.