Check out the Power Polisher thread for full details.
http://www.mbclub.co.uk/forums/showthread.php?t=6997 (See body work sticky) These machines are excellent and very safe. If you follow instructions on Autopia You will get an amazing finish.
The only issue is you can buy a machine like the UDM from Autopia for £75 ($150) and get a site transformer (240volt to 110volt) for about £50 so you can get yourself the same system but running on 110volts for less money.
I phoned around a few Meguiars stockests today to see if I could get one. I intend to do a group test

but sadly none of the shops have them they are only available over the internet.