We've been working on an off-site backup solution that ties Engine Yard to Amazon's S3 service.
Database backups run every 4 hours, moving the newest to S3 and removing the oldest from S3 automatically. S3 houses a 1-week rolling backup of our customers' MySQL database contents.
This means that even if a meteor strikes our data center, our customers' up-to-date db contents will exist elsewhere.
We're developing similar solutions for file system contents and SVN contents, as well.