Wired News has an article on the sort of-invisibility cloak that has just recently been created.  While being invisible to microwaves may not seem to impressive, I want to find out what would happen if you wrapped a fork in the cloak and then microwaved it.
“A team of American and British researchers has made a cloak of invisibility. Well, OK, it’s not perfect. Yet. But it’s a start, and it did a pretty good job of hiding a copper cylinder.

In this experiment the scientists used microwaves to try and detect the cylinder. Like light and radar waves, microwaves bounce off objects making them visible and creating a shadow, though it has to be detected with instruments.

If you can hide something from microwaves, you can hide it from radar — a possibility that will fascinate the military.”

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