PlanningAlerts is a project to provide better access to planning applications; I got involved in after investigating Weaver House. I added an API to get at the data .. GeoRSS feeds precisely. And now the API has launched .. here’s the brief spec on the PlanningAlerts API.
A feed is used in this Mapufacture map on Weaver House, layered with a BBC Weather GeoRSS feed and a Nestoria properties GeoRSS feed, all over OpenStreetMap.
Of course, it works at Google Maps too.