I’ve done some reading on Bonjour and mDNS through various forums and articles eg http://en.wikipedia.org/wiki/Bonjour_(software). It seems that the Firefly service simply broadcasting its availabilty is not sufficient for it to be consumed. It requires an mDNS application like Bonjour to resolve its name to be used. So I have answered my own question, yes Bonjour is needed.
However I believe there are other mDNS apps, the main alternative being Avahi. Is there anyone using this successfully by installing it on the Linkstatsion running Firefly, and if so, which binaries should I download. I’d rather avoid building it if possible, I not a Linux guy.
On the other hand I may have this totally wrong and would welcome being told so. Thanks.