Three stores near me that I frequent, two of them have not shown any signs of switching to a new system, but one of them (the newest store of the bunch) has had their money order machine down for roughly three weeks with no estimate in sight of when it will be back. I have learned to call ahead and ask the CS person if the sign that says money orders are down is still up before I head out.
On the bright side, while standing in line for the money orders, one of the cashiers who recognizes me took the time to tell me that the fee went up to .88 and I'd have to decrease to 999.12 for an even transaction.