Kanban Board for Debian Bug Tracker and CalDAV servers

Description of the project: using Python (?PyQt), create a desktop GUI application that can obtain task lists from various sources (Debian Bug Tracker's iCalendar feed and Github iCalendar, CalDAV servers like DAViCal and the Redmine REST API) and display a Kanban board, as used in Scrum/Agile. Additional considerations: how to manipulate the tasks in real-time with drag and drop, how to group subsets of tasks from different sources that need to be visualized on the same board.