I think that this thread could result in an interesting discussion about the level of risk that postal and other government retirees face and what level of preparation for these risks would be sensible for prospective retirees to put in place.
If I was a postal retiree, I'd be pretty worried. And if I was a postal worker, I think a sensible approach would be to build up a bigger nestegg before I'd apply to retire. I'd need some extra money to pay for private health insurance until the PPACA is in effect.
There have been massive numbers of new postal retirees in the past 2-3 years as the post office downsizes. Retirement incentives have encouraged more postal employees to retire, but given this news any further incentives may not be very effective. At least they wouldn't be for me, were I a postal employee considering retirement. Also, I can't imagine how one could handle a change like this in one's second or third year of retirement.