Google's Map API is one of the well known apis for mapping. Integrating that api into an asp.net web applications is a challenging working and we were googling around the web for getting an asp.net control for google map api.
There are lots and lots of results on the web and most of them are not usable for me, either they are not working or they are implemented in framework 3.5 and we need for framework 2.0.
After juggling with downloading codes and testing them around, finally we got a working example. here is a link: http://www.codeproject.com/KB/webforms/Google-Maps-User-Control.aspx. I hope this will help when you need to implement your code, and you will not have to go for google it again and again.
Happy coding :)