@Nathan - I can'gt say where and when offline access will come with that API, but that aspect is known and being worked on for this feature. At this point, its going to serve those who have a Logos account and library to take that conent with them - that idea early on about modules for Katana would work for something like this: user downloads Logos Plugin that has this API and gets that content.

To those wondering also, Qt is picking up all kinds of dev attention for Bible software. Nailing the core features and functions of Katana will do well for cross-platform options there as well.