I thought I'd read that setup tip late last year after first getting the iPhone, or maybe even earlier when just playing around with my older iPod Touch. I can't recall why I didn't end up using it.

Do you know if it's a workable solution for pulling Camera Roll images from the iPhone as well?

What I would normally do is import manually to Lightroom and then empty out the iPhone at some point. Right now I have a hefty amount of images because I haven't empties the roll in a long time.