Is it possible to enable popup for basemap that have query/data capability enabled? I am talking about our own basemaps, not standard online basemaps such as bing or topo. Typically basemap has layers like address, parcel, road, and people would like to click on that to get info. It will be awkward to have another operational layer of same thing on top of it just to setup popup. Other views such as flex seems have options of defining popup for basemap layer.
Although basemap service itself may have many sub layer for rendering purpose, it's an non-issue if it's deployed in a hybrid mode with simple mxd as service definition and complex mxd for tiles. I think some arcgisonline service was using that and it's transparent to end user.