nRF24L01 works fine with Ethernet Shield with W5100, but using that instead on small ENC28J60-module would be... cheating...?
I made this http://www.instructables.com/id/A-credit-card-sized-Ethernet-Arduino-compatable-co/ and I want to use it too.
Well, someday I will understand the problem better, googling googling googling...
Cheers,
Kari