The fine folks at it-mate.co.uk have set up a new mirror for us.
Here is a shell script someone has written to do just that: update-blackhole.sh. Please test it, improve upon it, etc.
We are also discussing internally options like bittorrent, jigdo, serving info via DNS, serving only the updates, compressing the files via gzip or bz2, etc.
We are truly appreciative and humbled by the support we’ve received. (Except for the one site which was using our files as part of a “speed test” – no thanks for you) …