On behalf of the Memento team, I would like to sincerely thank our colleagues at the Internet Archive for making this happen! This is a big step forward for Memento.
Cheers
Herbert
[1] Full compliance with the exception of the optional interval indicator that can be conveyed in the Accept-Datetime header and that is not yet implemented by Memento clients either. See http://www.mementoweb.org/guide/rfc/ID/#accept-datetime