Nice touch. Thanks.
Attached is a mod I made to s3config.rb to look for s3config.yml in the .s3conf, $HOME/.s3conf, and /etc/s3conf directories. That way you can lock down your s3config.yml in an appropriate directory but still run the s3cmd/s3sync.rb scripts from anywhere.
... WkH
Will be added to main version today. Check announce.