From: ACR-M-028: Meal, Ready-to-Eat (MRE), Assembly Requirements
And here are the new designs:B. Meal bag. Each meal bag shall be correctly and legibly labeled on at least one face with permanent ink or other dark contrasting color with the information contained in accordance with Figures 1, 2 or 3, as applicable. The label shall cite the correct Menu number, name of entrée, name and address of assembler, and cite "Vegetarian" when appropriate. Menus 1-4, and 13-16 shall be printed in accordance with Design 1 (Figure 1). Menus 5-8 and 17-20 shall be printed in accordance with Design 2 (Figure 2). Menus 9-12 and 21-24 shall be printed in accordance with Design 3 (Figure 3).



Wow...that's quite a change. But then again, they've had the current bag designs since 1996. I don't know when these new designs are supposed to go into production (if they haven't already) but I'd guess it'll be sometime in 2008 after the manufacturers run out of their stock of the old designs.
Jan. 25, 2008 Update:
I did a little photoshopping and put together these pics of what the new MRE bags might look like. Click on the pics for bigger versions:



Jan. 26, 2008 Update:
New web page added to the main site. This page covers current and past designs and talks more about the new design changes and how they were tested:
http://www.mreinfo.com/us/mre/mre-bag-design.html