An announcement has been posted on the Imprudence Blog that the weekend of November 21 they will be changing to their new name, Kokua. They say this will mean the Imprudence web site will be down. I suppose gone is more accurate.
Related sites like the forum, wiki, and download will remain up but it is unclear which URL will get you to them and when. However, they plan to implement domain forwarding so you should end up in the right place.
They say the login ID/passwords for the forum and wiki will remain the same. If you use ‘Remember Me’ cookies to login, those are going to break. Domain name changes do that. You should probably check that you still know your password.