MapPoint desktop, although not designed to work with asp.net, will work fine. I was never able to use the controls directly in asp.net code behind.....the threading architectures are not compatible. But if you create a seperate desktop application and use the mapPoint object model, it will work very well. You will need to use tcp/ip (or even file events) to interface with your asp.net app.

Zooming is supported:

dim oMap as MapPoint.map
aLoc = oMap.GetLocation(lat, lon, zoom)