If you have Nintendo products to register over at Club Nintendo, you better jump on the registrations as soon as possible. There have been some big changes according to the updated Question and Answer section.
Q: Do surveys expire?
A: Yes. In general, Product Registration surveys expire after 7 days, and Post Play surveys expire 120 days after registration. Please review the date listed next to the survey in your To-Do list to ensure that you take the survey before it expires.
120 days may be a big change from the years that were previously offered, but it's still not that bad. The 7-day survey window might be a bit tougher.
Thanks to GoNintendo for the info!