Yes I have been able to integrate RadControls for ASP.NET Ajax in MOSS.
The real question is I want to use Silverlight 2 and RadControls for ASP.NET Ajax on my MOSS server not wrapped in a webpart and both enabled in the webconfig file.
I have been able to achieve enabling Silverlight 2 following the MOSS silverlight 2 blueprint and RadControls for ASP.NET Ajax in MOSS following your webconfig guide but not both together.
We are looking to have a Moss environment where we can utilise both tools.
Help on this matter is most appreciated.