Hi Kris - thank you for all the work you've done on Marvin. It looks really good and I'm looking forward to discovering the good things in the next update.
I'm one of e people who keeps my Calibre library in Dropbox. I know what I see is limited to 1000 books, but I'm puzzled about how the most recent are selected. I can only see a few of the books I have uploaded in the past week (It's difficult to check back further). I upload through Calibre, removing DRM, and then convert everything to epub. Do you have any idea what I've done so that I can't see all of them?
Are you planning access to OPDS2 catalogs in the future? I know everybody has their favourite Stanza feature, and accessing my books via my own catalog kept in the public folder of my Dropbox folder was mine.