So we will be able to access our own Calibre2OPDS catalogues when we have put them online? Nice, for those using that.
For me though, since Faterson mentioned on facebook about marking the Calibre library folder for syncing with Sugarsync, and I have tried it with various cloud options, and then, all changes go everywhere at once
Add a book and sync. Then you can access your stuff wherever you are, without having to use a second program to have it online. I have not yet tried it with dropbox... perhaps that might be useful to try, given Marvin's Dropbox integration..