Well, I used mobile app to perform the tx and I don't remember getting any warning. Could be an app bug or could be that i just pressed OK :S Anyway, would be nice to have a tx including service somewhere, like macbook-air can do. A service in a pool (where for sure some blocks will be mined) were you can pay a fee and tell them your txId and make them include automatically in next block. If they implement it would be an extra BTC earnings for the pool operators.