A few weeks ago, we announced that we had significantly improved the guest author experience and had put it out to our Beta Team members.
We're excited to say that testing has gone well and we're rolling it now out to all of our members. You'll soon see the option to create Author Archives and to also change the authors on your posts. Since the initial announcement, we've also added the Author Archives to your blog's sitemap, so you'll now see them reflected there as well.
We've got even more in store for blogs with multiple authors, so we hope you join the Beta Team so you can get in immediately on these new features and all the other functionality that we're working on!