I made a link for you to test to WP's Top News:
One unfortunate problem which we also recently saw
with our C|Net channel: WP checks the referrer for the printer-friendly links. Since it sees our site as the referrer, it doesn't display the printer-friendly version but only the normal version of the article, even though we have the correct printer-friendly url. Interestingly, if you don't transmit any referrer, the printer-friendly link *is* shown. It would be nice to have a feature in Sunrise or iSiloX to either spoof the referrer or to at least disable sending it.
I'm afraid this is as good as it gets with the current referrer problem. Give it a try and tell me what you think. I could easily add more WP channels then...