No plans yet.You could add it to the default basemap gallery with something like this:function createBasemapGallery() {
//add the basemap gallery, in this case we'll display maps from ArcGIS.com including bing maps
var basemapGallery = new esri.dijit.BasemapGallery({
showArcGISBasemaps: true,
bingMapsKey: 'Av1bH4keF8rXBtxWOegklgWGCYYz8UGYvBhsWKuvc4Z15kT76xVFOERk8jkKEDvT',
map: map
}, "basemapGallery");
basemapGallery.startup();
dojo.connect(basemapGallery, 'onLoad', function(bm) {
// find a base map to remove
// in this case, it'll be the one named "Terrain"
var bm = dojo.filter(basemapGallery.basemaps, function(bm) {
return bm.title == 'Terrain';
})[0];
// remove the basemap from the gallery
basemapGallery.remove(bm.id);
// create a BasemapLayer and Basemap with the
// ligh gray basemap
var grayLayer = new esri.dijit.BasemapLayer({
url:"http://services.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Light_Gray_Base/MapServer"
});
var grayBasemap = new esri.dijit.Basemap({
layers:[grayLayer],
title:"Light Gray",
thumbnailUrl:"http://www.arcgis.com/sharing/content/items/8b3d38c0819547faa83f7b7aca80bd76/info/thumbnail/lightgray_thumb_webmap2.png"
});
// add the light gray basemap
basemapGallery.add(grayBasemap);
});
}
Or you can manually add it by building your own basemap gallery, see this sample: http://help.arcgis.com/en/webapi/javascript/arcgis/help/jssamples/widget_basemapManual.html