SlideShare going completely free

According to their blog entry: Giving You More Reasons to Share on SlideShare it's going completely free. All of the elements that were paid for under the pro version are going to be released to all users in a controlled one a month roll out. These will include analytics, profile customisation, private uploads and showcasing videos. This is going to put a lot of pressure onto AuthorStream which is still offering a premium service, and I wonder how much longer they are going to be able to continue to offer it.