If your looking for a fast video capture device the new BlackMagic Intensity Shuttle offers USB 3.0 HDMI Video Capturing is worth a look.
Its the first non-storage device to adopt the new USB 3.0 standard and using this super fast connection it can directly record 1080p footage going beyond AVCHD and HDV, as the format of the source is no longer relevant.
The BlackMagic Intensity Shuttle also has the ability to record up to 8 surround sound channels over HDMI and to upscale standard def. video to either 720p or 1080p in real-time as well as capturing 10-bit HD videos from HDMI 1.3 sources, along with S-Video, and composite.
Available to buy for $199 from Blackmagic
Via Everything USB