An oldie, but perhaps worth a revisit. Click this link for "20 Randomly Generated American Military Operation Names," via Dan Gillmor's blog. Here's a taste of what I got:
Operation Clambering Otter
Operation Awesome Daisy
Operation High-pressure Meerkat
Operation It's Best to Avoid Our Supernova
Operation Evangelical Python
Operation Grab Your Ankles and Prepare for Our Rocket
Operation Prepare to Be Destroyed by Our Uniform