The USPS has just posted on their website the availability of the 2012 Mail Use packet of stamps for $31.95, which is a bit above face value, but is still a bargain compared to having to buy full panes to get one example of each new definitive/special issue that came out in 2012:
https://store.usps.com/store/browse...sMusicVideosPre-orders are available presently, but they won't be shipped until October.
(Keep in mind that this Mail Use Packet does not include any commemorative issues for 2012, which would have to be purchased separately.)