The YQL code example doesn't work. When I run it, I get the error:

"text":"","rc":403,"oauthError":"BAD_OAUTH_CONFIGURATION","oauthErrorText":"No request token URL specified\u000a\u000a====

I just ran the example source without any changes.

You can try it here:
http://apps.yahoo.com/-Ybl8QN6e/yql2.aspx