Sorry for the double-post ... I actually have an example of this up online, if anyone wants to check it out. I use Darron Schall's ObjectTranslator to assist with strong-typing of deserialized responses. I've since adopted it to JSON which is handling pretty pimptasticly.
http://booleanbetrayal.com/2007/05/18/httpservice-xmldecode-objecttranslator-and-rabidsquirrels/
