Scientists at Oregon State University have developed the first non-theoretical material that can actually bend light "the wrong way" rendering it invisible to one wavelength.

 

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Cloaking is still a long way off as the human eye uses more than one wavelength, and so far they only have enough material to make up 1/4 the width of a human hair, but it is a huge first step.

Thats pretty cool, but its also pretty scary.

Beware of Oregon State. There are no official NCAA rules prohibiting cloaked football players. >:)

Interesting tidbit, however unlikely that we will see it realized in our lifetimes.