Counter-Zombie Operations at the Fireteam Level

http://www.wired.com/dangerroom/2011/06/army-gets-how-to-guide-for-zombie-invasion/
Wired also provides handy guides to terminating Terminators and stopping those pesky 500' monsters.

Meet the Zeds - Part Two: Z-Troopers

The first group is from Reaper's Chronoscope line

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The second group is from Studio Miniatures.

The officer

And two of the 15 sprues of troopers. Swapping heads won't be as easy as some other multi-part plastics, but it's not too different from converting metal.

New Alien Invader: Heavyweight Category

Here's a challenge from Pulp City for veteran monster hunters: http://www.tabletopgamingnews.com/2011/05/30/47005/
This bad boy stands over 5" tall. An impressive commander for alien legions or perhaps this is the reason the dead walk!