Any thought been given to introducing system-level announcements? By this I mean an announcement that would appear somewhere in the real estate (not necessarily where the space-level announcements are) on every page? This would be very helpful for when we have scheduled down time, are experiencing system issues or want to highlight something to everybody using our system.
Good idea, while it is not currently in the product, one way would be to edit the template.ftl file. This would allow text to appear on the header of each page, so with a bit of custom css / html you could have an announcement displayed.