A new contribution to this series turns up every now and then. This time it's Jordan. I still don't know much about this sheet and there isn't much information about it on the Jordan Post website. I understand it was a limited run of 5000 and although "2011" appears on the stamps, the FDCs I've seen on EBay are all postmarked 23 Jan 2012.
There is also a Nicaraguan Preserve the Polar Regions sheet floating around but I know even less about that one and I'm reluctant to purchase it right now until I learn more about it.