Pageback - keeps a google cache like copy of your website for zero downtime

Pageback is a website mirroring service that makes a copy of your website and hosts it on a CDN (Amazon CloudFront + S3) so that it is always available. You can flip to this backup site during an outage or while undergoing maintenance.

Here is a demo mirror site for Hacker News:

Pageback is now in private beta and I am looking for more folks to try it out. Thanks!