Ever wonder what used to live at IDEASTOX.com, or at google.com or at any url? Webstory is a site that tracks websites with monthly snapshots to show how they have evolved. Each domain has a lineage that is probably related, but can be completely unrelated. Track sites you follow and get updates whenever certain pages change their code.
I think it's interesting how the Web is approaching an age where each domain houses a unique history, and by studying that history, we may better be able to predict the future.