These look pretty cool. I like the fact that they correct the tripod mount lens allignment offset, and that it's available in annodized black.
CNC Machined aluminum base plate for the Panasonic HPX170 and HMC150
http://www.jdfab.com/theplate/products.html
CNC Machined aluminum base plate for the Panasonic HPX170 and HMC150
http://www.jdfab.com/theplate/products.html