Mhhh.... just checked the Synology thing.... I can download and install "SqueezeCenter" and "Squeezebox Server".
Which one do I need?
Also is the DAC in the Touch any good? i.e. decent enough to be usable until I get my BDA-1?
Nap. 
You need Squeezebox Server, which is the latest name given by the marketing types at Logitech
I used to run it on my NAS, but the CPU in the NAS wasn't able to provide sufficient performance. Went with a small form factor Shuttle PC, and just downloaded VORTEXBOX from
http://vortexbox.orgIt is rock solid and highly performant. And free. And you don't have to learn Linux. And you manage it remotely through a browser so no need for monitor or keyboard or mouse.
The DAC in the Touch is very good - consensus is that is the best of all the Squeezeboxen to date.
I have tried using a Cambridge DACMagic, taking the digital out, and it sounds worse. The Transporter gives the BDA-1 a run for its money - in A/B listening, I am hard pressed to hear the difference.