Because the project is open source, it certainly could be
made to work, but you would need to construct your own receiver. It appears the author abandoned the project some time ago, and never completed the documentation for the receiving side. He does list the protocol so there is enough information to build your own. There are two options - one could connect the receiving XBee directly to the TCB and write a new module in the TCB firmware to decode the data stream, or you could add a small processor on the receiving end that would convert the data from the XBee into SBus, which would require no changes on the TCB side.
So yes it is possible but not plug-and-play.
It's a great idea to use a PS3 controller. In my opinion an even better project would have been to
adapt the FrSky protocol and make it an actual RC transmitter, compatible with all standard FrSky receivers (or any other brand of your choosing for which the protocol has been decoded,
there are quite a few). This would be considerably cheaper (XBees are expensive and in his scheme you need two) and it saves you the work of building a custom receiver, you can just buy an off-the-shelf one. That would allow you to control not only the TCB without changes, but any other standard RC model.