Support regional geographic boundaries (pac districts in durham) - or maybe polygons? (seems less useful).
Show geographically relevant data right where the user is (on their phone in a restaurant, for instance)? (Nigel points out that you want to see this data when you are at the restaurant, or downtown — and not just seven days ago)
Provide better integration with custom providers - new york city, RTP, and...A way for providers to show their own customized reports, have some better control over how SMS and email reports look.
subscription management: ‘view your subscription’ doesn’t show you all your subscriptions.
better spec on the citygram for the interchange format - the current one on citygram seems limited or out of date.
Do people want to see data for a week or a month? Or perhaps the current day's/week's events within the context of last week/month.
Is there a use case for city employees to use citygram for notifications?
Change Citygram.org to look up your geographic location rather than requiring the user to explicitly choose a location - have citygram look up the closest city based on the viewers location.
We currently have two datasets integrated with citygram:
If you are in a group of 2 or more, consider doing a brainstorming and prioritization discussions and documenting your results in a comment below.