I have been working on improving how delivery lists are stored and managed as a Google Summer of Code student. Currently, I have completed the new backend, an interface for creating delivery lists (and importing from the current format), a basic interface for editing raw list content, an API for adding / removing target pages, and a list view that supports in-place removal and addition of pages. I will also create a UI for adding / removing multiple pages simultaneously and write tests for the features I've implemented. You can track my progress here. Please feel free to raise any questions or suggestions. Thanks.