Parisienne luxury goods house ST Dupont, one of the world's top makers of high-end pens and lighters, has brought some 'bling bling' to a common computer accessory - the Universal Serial Bus (USB) flash drive key. About the size of a pack of chewing gum, ST Dupont's new Diamond Head USB Key is a password-protected storage device with 512 megabytes of memory. But its astute design - a hollow mini-ingot of polished, engraved metal decorated with the Diamond Head motif - makes it a handsome piece of jewellery that can serve as both a key ring and a pendant. Priced at $3,100, the ST Dupont key is compatible with both Macintosh and Windows-based computers. Personalised engraving is also possible, for users who want the device custom-decorated for a special occasion.