I got it working again. At least it is for me. Post in the thread linked below if you experience any issues with it.
http://mycopper.net/Forum/yaf_postst1503_Yahoo-Email-on-home-page.aspx

A new Blog Directory has been added that provides a handy listing of all blogs. Only blogs with at least one post will be shown.

Free blogging is available to everyone with a Copper.net email address. By logging into MyCopper and going to your profile, you can create your own personal blog. Visit CopperBlog for help on getting started.

The MyCopper forum has been replaced with new forum software. MyCopper has tried very hard to make sure all posts and user information has been migrated over. However, there is the possibility that something fell through the cracks. If you notice something missing, please post it on the New Forum Feedback forum.