Polaroid may not be the first name that comes to mind when you think of adventure-friendly video cams -- Contour and GoPro own that space, with Sony now making a heavy push of its own -- but the insta-film maker turned camera manufacturer now has a rugged lineup of its own. First off the assembly line is the XS7, a $69 cam that packs a waterproof housing (rated to 10 meters), 720p video capture a
