There have been several updates since my initial review, and one of the things I noticed was a “Calibre Connector” in one of the menus.
I did some searching and discovered that books can by synced to Marvin directly through Calibre, over a wired sync. Since Marvin has one of the best Dropbox integrations I’ve ever seen, I wouldn’t suggest this for loading one or two books, but it’s a great way to sync lots of books.
So there you go. Syncing books to Marvin using Calibre.
And if you haven’t checked out Marvin recently, it’s just getting better and betetr. The feature I’m most enjoying is setting a time for Marvin to remind me to stop reading. I clear all toolbars and progress meters and just dive into the book, knowing Marvin will keep me from reading all night.