I spoke to the UK Importer today for Vizualogic....very helpful. They do have a system to the 08 Comfort Seats in the pipeline but it's not quite ready yet....it will be a hefty £1499! It sounds like a very flexible system though...both headrests come with their own DVD player and wireless headphones. They can also use the unit to play DVD/watch TV on the Satnav screen.

The system for the 08 comfort seats will look like the one on this page
http://www.vizualogic.com/active_headrest.html

The guy said it is not possible to mount inside the headrests with the 08 comfort seats.