The OLPC (One Laptop Per Child) XO laptop is supposed to be for kids, but, the grownups have been having fun with it as well. "After a few hours of tinkering with the kernel config, timezones (the xo's had to be synchronized with an accuracy of at least 0.5 sec) and the dependencies, the team successfully tested the first [http://www.olpcaustria.org/mediawiki/index.php/Quantum_Cryptography 'entanglement based quantum key distribution' between two xo laptops!]".
Source:
LWN.net
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