The Netherlands is about to become a test-bed for WiFi first and WiFi only telephony services, as both Ziggo and UPC offer free downloadable apps to use a growing number of WiFi spots for voice. Whether or not UPC Netherlands the local Liberty Global subsidiary, and Ziggo the largest Dutch cabelco, ever get around to a full merger, the two are clearly already working together to destabilize KPN, the incumbent telco. We have often theorized that they could work together on mobile telephony, an area where they are not at all dominant, possibly partnering with Vodafone, the second largest mobile operator in the Netherlands, to the detriment of KPN. What supports his idea is the fact that Ziggo already has…