Plugging things in is so 2009. Now Wearable has begun to ship out their new AirStash wireless flash drive (via Electronista). This gadget acts as a WiFi server that can stream content from an attached computer through the USB slot, or via an SD/SDHC card.
The AirStash has around five hours of battery life unattached to any device. It uses HTML5 to handle the web interface, which allows it to easily share with Apple devices like the iPad. Since the pad lacks any sort of physical USB drive, this would cut down on quite a lot of hassle. The AirStash costs $100 and is now shipping.