Mike, my wife and I use the eyefi mobi 8gb cards in our nikons, hers being the v1 and mine the d5100. I like it for transferring to my iphone whilst my wife uses hers to her MacBook Air.
To get images to her macbook she simply turns the camera on and with the eyefi desktop transfer program installed it automatically connects and transfers all her photos (Jpeg only on mobi) to a pre defined folder, popping them in sub folders based on date of shot. It also separates videos out too.
I've then set lightroom up to look at that folder when she presses import so they all add to her lightroom library in an instant too.
Copy speed is slower than USB but I would estimate to mac it's a second or so a photo, more than acceptable in my opinion, at least for our JPEG 'normal' workflow. If I'm shooting raw I take the card out and use a reader but I think the eyefi pro cards also can transfer raw images
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