Explanation

Flickr Demo using the Community MapBuilder Flickr Feed
Note: Requires Server/proxy support to access Flickr (Assuming it is up). It takes a few minutes to load the pictures from Flickr...
The demo uses a custom widget (FlickRest2Wfs) with a complex XSL stylesheet. It first parses the list of pictures from the Flick REST api, then fetches the detailled description of each picture, and outputs it all into a WFS FeatureCollection. The resulting feature collection is displayed on the map and as a list with picture thumbnails below. The list is connected to the map, so when the mouse is over a list entry, the according point will be highlighted on the map.
The SLD file for this demo uses an OpenLayers extension to the ExternalGraphic element, which allows us to show thumbnails of the images with urls from a feature attribute.
Note This example does not use the new GeoRSS feature of Flickr, because our Mapbuilder images are not tagged in a way that allows the Flickr GeoRSS processor to determine the positions.