Not entirely surprising.
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This is why the first thunderbolt peripherals are DAS RAID arrays and FCAL HBAs. This is stuff really intended for the professional market at the moment, not consumer devices, as there isn't a consumer device need for this crazy (yes, it's crazy!) amount of bandwidth. Not until production significantly catches up will things start to become cheap enough to make consumer devices.
There are a whole new generation of high frame rate, HD video that is going to take bandwidth like this and eat it alive. Watch.
This is why Apple is pushing Thunderbolt. Even in it's first incarnation it is an insane amount of overkill. It will not be quickly obsolesced.
It is going to go the way of SCSI IMO. That is a fast interface that is very complex but eventually is replaced by a connection of near speed but less complexity. The material science behind fiber optics has been uphill for the past thirty years. My crystal ball is that a sub-set of the USB 3.0 will challenge Thunderbolt but we are going to see both like USB 2.0 / Firewire for the next few years.