Headphone happy Skull Candy has released the latest in its Double Agent series with these colourful cans. The MP-640s aim to destroy your portable media player, by having their own SD card slots built in. Just pop a card loaded with MP3 tunes into the headphones’ trapdoor, and start headbanging like there’s no tomorrow. They also come with a USB cable for charging and PC use, and a 3.5mm stereo cable (but why?). They’ll be available in the region soonish, for an even US$100.