It’s not really, but I read about an excellent google maps mashup today which crawls over UK local authority websites for planning applications and then mashes the results up on a google map.
In beta at present, PlanningAlerts is an excellent idea that allows you to specify an area that you’d like to monitor and then notifies you by email as and when it discovers relevant planning applications in that area. 150 authorities are covered at time of writing (sadly my own isn’t yet).
So you’d find out if a planning application was submitted to knock London Bridge down. As soon as I read about the site, I thought of MySociety, and sure enough they are hosting the site.
Google Maps Mania is an excellent source of news on interesting google maps mashups – it amazes me how many inventive applications people have come up with involving location based information.