I have a small web mapping application based on PostGIS/GeoServer/OpenLayers.
I'm overlaying few WMS layers served by GeoServer and using OpenStreetMap as a background.
In OpenLayers OSM is simply called as:
var osm = new OpenLayers.Layer.OSM("OSM"); map.addLayer(osm);
How could I display OSM basemap in shades of grey to accentuate my WMS layers?
Is there a way to use existing styles from CloudMade's Style Editor for that purpose?