As Mark Goldsmith pointed out, there are 2 new generic sheets available. On March 15th, a new Happy Holidays sheet was released for Passover. This has a February 20th, 2011 printing date. This is the first reprint of the Happy Holidays generic sheet, and the third consecutive year there has been a special generic sheet issued for Passover.
The second new sheet is for the Nachal army song group. It is a reprint of the flag generic sheet with a printing date of March 22nd. I am not sure when the first day of issue was. I have only seen this offered on E-bay starting last week, so it must be pretty recent.