If you grow weary of those cumbersome USB flash drives you've been lugging around (most weigh about 10g), here's one that sheds nearly all of its weight. The Transcend JetFlash T2K weighs just 2 grams, and is available in your choice of capacities from 1GB ($15.90) to 4GB ($48.30).
Judging from the size of microSD cards the size of a baby's fingernail, we knew this was coming. The T2K isn't so small you would lose it in your pocket, but it's not big, either—it's just 1.6 inches tall and a mere 3mm thick. Can they get smaller than this? Probably.
Product Page [Transcend, USA]