You have to like it when you answer your own questions. The answer to the question is that, at least for postal codes in the US, the state is available. Using the following javascript line as the request:
Code:
request = 'http://ws.geonames.org/findNearbyPostalCodesJSON?postalcode=' + postalcode + '&country=' + country + '&radius=0&callback=getLocation';
we are able to extract the state abbreviation using:
Code:
var txtState = document.getElementById("txtState");
txtState.value = postalcodes[0].adminCode1;
Cheers to anyone who needed that info!
robrichard