If you are creating an Avalon application that talks to an Indigo web service, you can generate a proxy class that supports databinding using the /enableDataBinding switch (or /edb in short form) when using Indigo's svcutil.exe tool (the moral equivalent of wsdl.exe for .asmx web services).  This is nice because the tool will automatically implement the INotifyPropertyChanged interface, which means once the class is databound to your UI, the UI will automatically update when there is a change to the proxy class.  Pretty handy.