I was so excited about being able to sit in my armchair with my Treo650 and SAG 1.08.803 software, to transmit music to my home stereo system with the Motorola DC800 that seems to be advertised on just about every Treo website. So I bought one...
Unfortunately it looks like is still doesn't work!
The Treo and SAG (Softick Audio Gateway) do "seem" to pair with the DC800, but unfortunately no sound comes out the RCA jacks of the DC800.
I really hope that SAG can fix this.

The flow in the other direction is works wonderful.
I can pipe my stereo into the DC800 and use my Sonorix BlueTooth stereo headphones anywhere in the house & garage. (Normally with the same BT headphones fed directly from the Treo650, it has a range of about 5 feet.)