Jeremy,
I have been using the ToughTech Duo by Cru-Dataport -
http://www.cru-dataport.com/ - for a few months now with the express purpose of taking it with me to shoot this years Miss America Pageant where I usually generate 60 gigs of images. I was able to shoot and back everything up right from the foot of the stage.
I have to tell you that it not only works flawlessly but it feels more solid in your hand then any photo can show you. You can tell a lot went into the production of it and I am really happy with its performance. It's a wonderful thing to be able to pull it out of my camera bag and start using it with no power outlet in sight also.
So bottom line - I would highly recommend it to you or anyone else for that matter - I think every photographer, still or video, should get one.
Happy shooting.
Bruce