With regards to USB OTG support, according to the ifixit teardown the SlimPort is this:
http://www.analogix.com/products/7808.html
Which does say "USB host, device or OTG data passes through by default" so I guess it should work.
http://www.analogix.com/products/7808.html
Which does say "USB host, device or OTG data passes through by default" so I guess it should work.