Catch an exception thrown by an async void method

Using the async CTP from Microsoft for .NET,
is it possible to catch an exception thrown by an async method in the calling method?

public async void Foo()
{
    var x = await DoSomethingAsync();

    /* Handle the result, but sometimes an exception might be thrown.
       For example, DoSomethingAsync gets data from the network
       and the data is invalid... a ProtocolException might be thrown. */
}

public void DoFoo()
{
    try
    {
        Foo();
    }
    catch (ProtocolException ex)
    {
          /* The exception will never be caught.
             Instead when in debug mode, VS2010 will warn and continue.
             The deployed the app will simply crash. */
    }
}

So basically I want the exception from the async code to bubble up into my calling code
if that is even possible at all.