Hi, have you found a solution already?
ScriptTagProxy expects the server's response in a specific format. Take a look at this:
http://gwt-ext.com/docs/gwtext2/com/gwt ... Proxy.htmlBut in this case, Yahoo just returns a csv file. Looks like that is the problem. One way to get the data would be to have a servlet which hits the Yahoo url, parses the CSV and converts it to JSON/XML and then use a JSON/XML reader on the client.
You could also try out GwtProxy if you would rather use a GWT remote service to do the work.
http://www.gwt-ext.com/demo-ux/#gwtProxySample