Yes, it might seem strange to have these two software and/or enterprise-oriented features on a tiny personal site, but why not? If a changelog can show users the progress of software, why not a website? And the same with a roadmap: It might not matter what’s ahead for this particular blog, but what if bigger sites like ESPN or Zeldman.com published public roadmaps, giving visitors a peek into their plans and their processes?
As a developer, and as a reader, I’d love to see more of these types of transparent peeks into the past and future of websites – both large and small.
Update: Nice! The Verge publishes a Version History.