Thanks for the update. So realistically we should expect an update by the end of the year....
The development discussion of this product is an interesting one. ESRI keeps pushing ArcGIS Online and Server for web maps. Unfortunately, not all GIS users have high-speed internet, cell phone coverage, etc. In my very rural area, I'm going to be relying heavily on this free viewer to distribute GIS maps and data. Most rural areas have dial-up internet or DSL less than 3mb speeds. Pushing web maps is fine where there is infrastructure, but for those of us that have to deal with technology limitations, we still rely on these viewers. I sure hope ESRI does not stop developing a free standalone viewer, because if everything keeps getting pushed to the web and AGO, we'll have to stop using ESRI products and pursue other avenues, like open source software.