Thanks for the suggestion, I tried it and i I did get it to work in the SB to SB mode!
However, my original post was based on the assumption that the squeezebox server could deliver content to the Media Director based on what was playing on the SB server. As far as I can tell, this is an erroneous assumption, unless an additional SB device is directly attached to the MD. Is this how it works for you?
if so, it seems to me that getting the SB server to declare itself as a SB device to lmce--thereby saving the lmce user the additional expense of attaching another SB device that duplicates MD functions--would be a very valuable addition to the system. Vortexbox.org already does this on its fedora-based SB server (identifies itself as a SB device) and this enables you to simultaneously play music on it as well as the other SBs in your home.
Before I go further down this road, I just wanted to be sure that I have the current lmce-SB server relationship right.
In any case, thanks for your help, it is deeply appreciated.