One for Dave really, but how feasible would it be to create an area-based change notifcation - for instance when a new pub is generated in a given town or region?
The idea is that users could 'follow' a town (or whatever data field would relate to an area in the same way we can follow a pub, so any change (closure, opening, review, name change etc) would be notifed.
Would anyone find that useful, or maybe it would need too much work to code, or maybe the data model wouldn't support it.
Just a thought.