For your reading pleasure... WFT-E1A and 580 are updated officially!
Speedlite 580EX II Flash
The popular Speedlite 580EX Flash is being replaced by the new Speedlite 580EX II Flash, which features a host of improvements, including a metal hot shoe with an improved locking mechanism for added durability, an external metering sensor for non-TTL automatic flash exposure control and a PC socket for use with non-dedicated slave triggers. Fully compatible with all EOS SLRs, the new Speedlite 580EX II is gasketed for dust and moisture resistance, making it possible for users of EOS-1 class digital SLRs and many L-series EF lenses to use flash safely when shooting in dusty or wet environments.
Wireless File Transmitter WFT-E2A
The new accessory dedicated Wireless File Transmitter WFT-E2A allows wireless transfer and backup, as well as remote control of the camera in Live View mode. The new transmitter is much smaller and lighter than its predecessor and more affordable as well. The WFT-E2A has many useful capabilities besides wireless transmission of digital photos. In addition to supporting the EOS-1D Mark III Digital SLR’s Remote Live View functions, it can also be connected to various Hi-Speed USB 2.0 external storage devices such as high-capacity hard drives or convenient flash drives with much larger storage capacity than the memory cards in the camera, for instant backup as images are captured. Whats more, the WFT-E2A can be connected to portable GPS devices to record GPS information (longitude, latitude, altitude, UTC) which is added to file metadata and displayed on the camera’s LCD screen below the histogram.