kyxap you may not have noticed but most ZEN pools are currently under DDoS attack... We'll have everything up and running as soon as we can.  MINING IS STILL WORKING.  Only the front end website was affected.

Regarding the 20% miner bonuses:  We were going to announce the start time last night but obviously when DDoS started happening we had to delay.  As soon as things are stable and we have reorganised the site structure to add some more protection we'll start the first bonus round.