var cloudmade      = new L.TileLayer.CloudMade({key: 'API-KEY', styleId: 997}),
    openStreetMap  = new L.TileLayer.OpenStreetMap(),
    openCycleMap   = new L.TileLayer.OpenCycleMap(),
    mapquestOsm    = new L.TileLayer.MapQuestOpen.OSM(),
    mapquestAerial = new L.TileLayer.MapQuestOpen.Aerial(),
    mapbox         = new L.TileLayer.MapBox({user: 'kkaefer', map: 'island'});