The update that most people are seeing is specifically for the 32GB WiFi and 3G version of the tablet. There has been no indication that the WiFi only version is getting the update yet. The update brings the machine to software version 3.55.405.1 and it’s large. The download is 210MB so a WiFi connection would be a smart place to download.
We have also heard that folks in Holland are also getting the update as well. If you find the update is available be sure and let us know how it works and where you are located.