Adafruit Industries is not only a hardware hacker's candy store, the woman-run empire based on fun, slightly subversive and truly innovative DIY hardware kits has released their first in a line of original, open-source jewelry: iCufflinks.
Open source electronic cufflinks that pulsate like Apple Macs - a very last minute ultimate geek gift for Father's day. I co-designed these little cufflinks that subtlety pulsated like a Mac. I wanted something that was futuristic but still classy enough to wear for special events when I need to get dressed up. There will be a necklace version too, of course.
Gorgeous, they're machined in Air-matching aluminum and "pulse" much like your MacBook - the default pattern is reverse engineered from the Apple "breathing" LED on Macs, MacBooks, iMacs, etc. - with a brilliant open-source exception.
Even if you don't require hackable cufflinks for your next fancy event, VC meetup or launch party, they're smartly made to power up right out of the box: the included battery snaps in, then screw on each link's backing and the iCufflinks softly "breathe" for up to 24 hours.