I received that Yahoo for Teachers beta is now open.  I have a password but I’m not sure if it’s unique to me or if can share it.  However, you can sign up by going the Yahoo teachers page and entering your e-mail address on the bottom left.   That’s how I found out about it.  It appears to be a place for teachers to share ideas, lessons, and resources for free with each other (sounds a little like Open Court Resources don’t you think).