Any Honda dealership technicians out there?

Does anyone know how the Civic Si's (or any new Honda for that matter) computer is reprogrammed? I work for a BMW dealership and we reprogram the cars through the diagnostic port. Does Honda have a factory tool that is used to diagnose and reprogram the car. Are there any Honda technicians out there?

Also does anyone know what type of bus the Honda ECU and other control units use? (i.e.: CAN (controller Area Network) bus)

Thanks,

Scott Tucker