We are also having issues - we cannot display the oil plume service in a .Net ADF map. When trying to add services from events.arcgisonline.com/services to a .Net ADF app you get the error in the attched image. Same error is returned in .Net with the sample code belowAlso get an error returned when trying to view the WSDL at http://events.arcgisonline.com/arcgis/services.
//attempt to connect to gis server
dsDefiner = DataSourceDiscovery.CreateDataSourceDefiner(serverType, DataSourceDiscoveryTarget.WebApplication.ToString(), out error);
definer = dsDefiner as DataSourceDefinerWeb;
definer.UseDefaultWebResources = false;
definer.WebResourceLocation = Page.ResolveClientUrl("./");
definer.DataSourceType = serverType;
definer.Definition = serverURL;
resType = new ResourceType[] { ResourceType.Map };
definer.ResourceTypes = resType;
dsTree = definer.GetDataSourceInfo(true, out error);
//dsTree is null and error contains the same error message as above