Just as the Live Framework CTP, this one will also disappear. It lasted little over a year. On the question what will happen with the Virtual Earth/Bing Maps ASP .NET Control, Chris Pendleton posted the following:
But he doesn’t leave you hanging like that. He points out the Bing Maps ASP .NET control (Web.Maps.VE v2.0) from Chris Pietschmann (Simplovation), of which you can download a trial for free. Furthermore John O’Brien (Soul Solutions and LiveSide Dev Contributor) is planning on posting the code of the original VE ASP.NET control, which he wrote, to CodePlex.
If you want a supported .NET interface from Microsoft, you can use the Bing Maps Silverlight Control which is currently in CTP. Which, according to Chris Pendleton, will come out of CTP and become a supported version, so you do not have to fear it will share the ASP .NET Control’s fate.
Time to get into Microsoft Silverlight?