My favourite new plugin for Ruby on Rails is backup_fu.
backup_fu makes managing Amazon S3 backups really simple.
I have been running my own Rake Task for MySQL Backup to Amazon S3, but I’ve switched my projects over to backup_fu instead because it has much better control over your backups and will even backup stored files.
I’ve also created a patch for backup_fu that allows you to specify the mysqldump options. It should get rolled into an upcoming release, but if you would like it sooner, just contact me at toby…@info-architects.net.