Everything will be released by the end of may on the next ANN, but for now, here are the determined specs

Swap: Aerium -> AeriumX
Swap Ratio: 121:1
MN Collateral: 1000 AEX
Reward per Block: 10
Time between blocks: 1 Minute
65% Masternodes | 35% Miners
Masternodes payments will only start after one week of launch.

(And yes, I'm the main developer)