Elecom (MR-SMC03) & Buffalo (RMUM) release ultra tiny 3g USB Micro SD card readers in Japan. Both Elecom and Buffalo have both announced the availability of supper tiny USB Micro SD card readers. Both units are essentially identical, weight 3 grams, and are unique in that the micro SD card slides into the inside of the USB jack. The card reader is small enough to be carried on a cell phone strap and can read Micro SDHC cards as large as 8GB. Priced at about $20
Available outside of Japan at Conics.net
Buffalo's website
Elecoms website