Yep. Looks like what I thought it was:
"Building on the simplicity of flat-rate shipping and value of Forever postage, the U.S. Postal Service today announced a new way to ship that lets customers lock in future postage at current prices using select Priority Mail Flat Rate packaging."
http://www.usps.com/communications/news ... 11_047.htm
http://www.usps.com/shipping/prepaid.htm
It's always possible that the USPS could default on their "forever" promise, but it's a hedge at least...
To good to be true? Thoughts?