There is new version 1.1.2.1 of Xedoscoin wallet.
Implemented new feature - the possibility to store messages/keys in zero value OP_RETURN transactions.
(As realized in bitcoin 0.9 wallet).
The new feature can be used to send simple messages through the network or for PoE(Proof of Existance) validation.
I think there will be more uses. You can imagine.  

If you are a miner - please upgrade to 1.1.2.1 , so you can validate such transactions.