Does archive.org plan to implement a download feature and domain archive coverage indicator? (I assume they don't have that, otherwise you'd probably mention it. It would also make sense to publish such incremental archives as distributed version control access points.)

Edit: From the FAQ:

Can people download sites from the Wayback?

Our terms of use specify that users of the Wayback Machine are not to copy data from the collection. If there are special circumstances that you think the Archive should consider, please contact info at archive dot org.

(No explanation is given for why this is though.)