I am using a Dazzle DVC-80 (Dazzle here: http://www.usb-ware.com/dazzle-dvc-80.htm ), video capture device with XP.

The capture device connects to my laptop via USB. I can view live tv from my Directv box on my laptop, but when I try to setup my LIVE TV connection, ORB doesn't recognize the device. The setup for ORB only asks if you are connecting using coaxial, composite or S-video, nothing about USB. I'm stuck.

not really the right forum bud, no where in you MSG do you even mention the iPhone. By the way orb streaming on the iPhone is very lousy, especially tv streaming due to the filetypes. For good streaming to an iPhone get a mac and use eyetv this gives the best possible streaming. To make the most of your windows setup put vista premium on it and use media center to tune tv. It really changed my life.
Good luck hope you can get what you want working.
By the way your title does not comply to this fourms rules please read the stickys at the top of the page.
This thread will be locked soon.
Still best of luck, I spent a few months with orb and gave up.

I am trying to stream to iphone. Thanks for your help and suggestions.