When this was posted 2 weeks ago, I tried to step up and do the hosting with Amazon's Cloudfront. 72 hours and 3TB later, I sadly acknowledged that I didn't have the checkbook size to properly meet the download needs.
Since then, @datassette has moved hosting to Dreamhost and they're truly sticking by their unlimited bandwidth policy. So as much as we typically like to point out when DH is down or messes up, I think they deserve some public acknowledgement for doing something right.