So I'm trying to use Google Voice (via Whistle) on my 16Gb 3G iPad, and when I call my Google Voice number it says "The subscriber you are trying to call is not available...". I'm not sure why, but Google Voice wanted to forward all calls to another number, so I put in my home number. Anybody have this setup working successfully? Where does Whistle fit in with all of this? Any help would be greatly appreciated! I freelance, and I'm hoping to use this setup to receive phone calls from clients when I'm out of the home office.