You don't have to wait long for Monday's CNET Update:
Sales of the Nintendo Wii U system began Sunday, following a midnight launch event at the Nintendo World store in New York. But anyone getting a Wii U will need some patience before getting started. A required 5GB firmware update can take an hour or two to download, but be sure to not turn it off once the update has begun! Some users that turned off the console before the download was complete have "bricked" the machine and need to exchange it for a new one. You can read our review of the Wii U here.