1 - user management: adding users, logging in
2 - shield some pages from non-logged-in users
3 - allow non-logged-in users to submit events, to be validated by logged-in
4 users before they are shown
5 - manual duplicate resolution
6 - 'tabular' calendar view
8 - time, description, url, feed, duplicates and their urls
9 - solution for dropped/cancelled events?
10 - more internationalisation
12 - dropdown problem with css in ff
13 - checkbox 'show by default' per feed, for initial selection
14 - review database concurrency approach: let spring manage transactions/EM?