To give folks an example, my bank is offering billpay that allows for 24 hour turnaround time. For example, if I have a bill due Jan 2nd I can pay it as late as Jan 1st.
Another example: I frequent a store that takes my check, runs it through a merchant services machine and the total is immediately debited from my checking account.
I like the immediacy of scheduling a bill pay. I don't like knowing my check is now just like cash at certain stores.