I have downloaded the sample application "FaceOut" and explored it . There i could see the WCF services.
Here i just wanted to know whether infragistics supports .Net RIA Services of Silverlight 3.0 Data Visualization or not.
Could you describe the scenarios you are interested in?
I've attached a sample of a simple RIA Service being bound to the XamWebChart. Is this the sort of thing you are interested in, or do you have something else in mind?
The sample relies on the sample database also included in the zip file.
-Graham
Some screen shots: