Back in December, I complained that my Zune Card wasn't tracking any plays because I wasn't a US American. At first I thought it was because of my IP address, which is how the Zune team stops me from seeing the Zune Originals site, but after doing a bit more research and hearing from people outside the USA who were able to have their plays tracked, I realized it was something else. Then I found someone else who was having the same problem, and he solved it.
The answer? The Zune Card filtering isn't IP-based, it's based on the Regional and Language options. If it's set to anything other than "English (United States)", the Zune Card will fail to update. Changing it is simple. Under Windows Vista, go into Control Panel > Regional and Language Options > and set Current format to be "English (United States)". The steps under Windows XP are nearly identical.
After I made this change, within a few days I started seeing this: