2017-11-26, new DLL released, install the DEV build and you can use it for unlimited period.

Today we release a new updated GoogleMapControl DLL that wraps the entire GoogleMap javascript API 3.0. The control makes it easy to add GoogleMap to your C# or VB.NET webform application. We also improved the documentation and code sample section.

Install the DEV build and you can use it for unlimited period of time to test and develop your product. It has a message just below every map use, that it is a non commercial build. When you want to use the control on a production server for commercial use, you can Purchase the Commercial Build to get access to all product updates and the ASP.NET Google Map Control expert support.
Take it for a spin here: http://codesamples.googlemapcontrol.com/samples/