I picked up a Verso clip for my Kobo a couple of days ago (turns out reading in bed at 1am with all the lights on makes for a grumpy wife the next day - who knew?
). The gripper part of the clip has two rubber pads on it preventing any plastic on the clip from contacting the Kobo. I could not see any marks or scratches left from the clip on the Kobo the next day.
The light is OK to read by, the glare is nonexistant unless you position the light directly between your line of sight and the screen. It's no bed lamp, to be sure, but it does the job well and doesn't bother your beautiful wife while she's trying to sleep
