That is my question too. I have the URL entered and I am sitting here at home with my iPod Touch. My Console is next to me and changes on it are not being reflected on the iPod. The Update time is static. If I close the app and start it again the the data is current. I noticed the new WDLiveapp option in set up (thanks to a previous post here) and gave the top item a tick.
As an experiment I deleted the app from the iPos and restored it back again from the updated app using iTunes and a cable. I switched it on and default data appeared i.e. 62.1F at an update time of 11:17:29 AM. At this stage I haven’t added a URL. Not sure if this helps?