The PBwiki software that we've been using to host our reference wiki is being upgraded on March 9. Prior to that upgrade, the way we all log in to the wiki will change. Instead of having a shared password, we'll each create a PBwiki account. Once you set have set up the account, you'll need to click a link on the login page (just once) to request permission from the wiki administrator (that's me) to have access to the wiki. Once approved, your PBwiki account will allow you to login and edit or view pages as before. One nice aspect of this new login system is that you will no longer have to remember the shared password but instead one that is more meaningful to you (i.e., you get to pick your own password when you set up your PBwiki account).
In the next few days, I'll change the settings so that we'll be using the new login system. As soon as I do, I'll notify everyone again here via the blog. If you have questions or problems, let me know.