1. A system for providing a geofeed stream, the system comprising: one or more processors configured to execute one or more computer program modules, the one or more computer program modules comprising: a geofeed streamer module configured to: receive a request for a geofeed stream that includes real-time updates of geofeed content items that are relevant to one or more geographically definable locations and aggregated from a plurality of content providers based on requests formatted specifically for individual ones of the plurality of content providers; obtain a first geofeed content item that is available at a first time, wherein the first geofeed content item is relevant to the one or more geographically definable locations and is aggregated from at least a first one of the plurality of content providers; generate the geofeed stream that includes the first geofeed content item as at least part of the geofeed stream; cause the geofeed stream to be communicated; obtain a second geofeed content item that is available at a second time after the first time but unavailable at the first time, wherein the second geofeed content item is relevant to the one or more geographically definable locations and is aggregated from the first one of the plurality of content providers or a second one of the plurality of content providers; and cause the second geofeed content item to be communicated such that the geofeed stream is updated with the second geofeed content item.