I think I am curious about this as well.
I have a Roku Soundbridge and a Logitech Squeezebox. I upgraded to 1 gig of ram and the Squeezebox seems to be working pretty well.
The Soundbridge is working well also but I am unable to figure out setting up playlists for it.
The Soundbridge does not seem to like the new Squeezebox software and I think the DLNA would be plenty fine except I can't figure out playlists for it.
I think Firefly would be an answer, but I removed it and I cannot seem to find the proper file to reinstall it.
So I need to figure out playlists for DLNA or how to reinstall Firefly.
Thanks for any thoughts or replies!