See: @Did some back-of-the-napkin computations, seems optimal #PacketCrypt block miner will be a clusters of GPUs connected by (at least) 100Gb network.
This is fantastic b/c the algorithm basically incentivizes people to design monster #cjdns nodes.
I was hoping for this when I designed it, but I thought CPU would beat it. But with network interfaces nearing the speed of main memory, I think this model wins.