Peter Cooper blogs on Easy Backups for SVN Repositories, Databases, and Code using Amazon’s S3 service. 

Adam Greene has put together a great set of Rake tasks that use the Amazon S3 file storage service (and Amazon’s own Ruby API) to make backing up your Rails application’s code and databases easy. All it takes is a single call to Rake and you’re backed up on Amazon’s redundant, secure systems.

(Discovered via the Ruby Advent Calendar.)