At least three units will output SACD data via firewire using the standard format agreed last Autumn/Fall. They are the Sony SCD XA 9000es, the Denon A-11/5900 and a recently released Pioneer universal player (I think it might be the 59Avi). All of them output a DSD stream using firewire and a common (i.e. standard) format.
There have been some problems with the Denon unit being unable to communicate with non-Denon gear; a firmware upgrade is said to correct this.
There have been some problems with the Denon unit being unable to communicate with non-Denon gear; a firmware upgrade is said to correct this.