42. The method of claim 39 , comprising, with the shared content server, processing any of (i) an item of content received from a said node, (ii) supplementary information for that item of content.
43. The method of claim 42 , wherein the processing step includes generating any of (i) a thumbnail representing a said item of content received from a said node, and (b) one or more versions of such item of content optimized for presentation on one or more said nodes.