I have one of these goose-neck mounts from my Treo days:
http://www.seidioonline.com/ProductD...de=MWS1GN8-G25
And it looks like this iGrip might have the same plate attachment setup. I wish tere was a way to be certain... (still doesn't help folks in CA, sadly).
Pro-Clip will likely have a nice solution that can be non-windshield-mounted, though not quite yet:
ProClip Mounting System *-*Choose Your Country