Sanho had its Kickstarter-funded CloudFTP at Macworld iWorld 2012 (see video).
CloudFTP is a pocket size adapter that can turn any USB storage device into a wireless file server, sharing files with WiFi-enabled devices (iPad, iPhone, computer etc.). It can also automatically connect to the Internet to backup and synchronize your USB data with popular online Cloud storage services like iCloud, Dropbox and box.net.
CloudFTP features a powered USB port (just like on the computer) which connects and powers any USB mass storage device (USB hard drives, flash drives, card readers, digital cameras etc.)
By default, CloudFTP creates its own (ad-hoc) wireless WiFi network to share the connected USB data. Users just need to join this network from their WiFi-enabled devices to access the USB storage device wirelessly by means of a HTML5 web app, dedicated iOS/Android app or FTP client. This network works independently of the Internet and other existing wireless networks.
CloudFTP is expected to ship in early February to Kickstarter participants and will cost $99.95 retail.
More info: http://www.kickstarter.com/projects/125911486/cloudftp-wirelessly-share-any-usb-storage-with-ipa