[TechniSol]

I would simply submit that the metadata approach is superior in overall concept, and that the same interface mechanism used to sort the books for browsing on the reader could also allow for Search as outlined earlier. Further, allowing for the editing of metadata on the device would be rather simple as well since the mechanisms already exist to extract it from the files... (I'd still want Calibre, for all it's many functions -especially backup, but there is no reason one could not perform simple metadata editing on the ereader.)

The reason I brought this up is that I see no REQUIREMENT for Calibre with a meta data based organization system if they added a little editing to the Kobo firmware, but it does act as a very powerful and desirable add-on any way you cut it.