intriguing design! looking forward to hearing how it works out for you.

The only potential problem I can see is that it is long and flat in some configurations which may make it prone to fall out of the wall socket (Ive never seen one of these other than the pictures in the link you posted mind you).

If you are looking for alternatives, I have found reasonable success with this one (though I think mine is actually an older model):

http://www.porta-charge.co.uk/accessory_0253.html