This project would include fixing the so-called WPRewards plugin to make it work with an affiliate network and with it's virtual currency widget. This is all what it needs, the other aspects of the service are done.
let me know if you have any questions,
I personally will be working with you and I'll be available most of the time when you have questions during the project.
In terms of communication, using Skype would be the easiest.
Let me know your offers.