Backup software using Amazon S3

I got this site http://jungledisk.com/ from
http://jeremy.zawodny.com/blog/archives/007641.html I got to from here: http://digg.com/software/A_List_of_Amazon_S3_Backup_Tools

I do not have a digg account, but maybe one day.

I am interested in back up software that works on my Mac.

Currently, I use http://www.ironmountain.com/digital/ but that is for Windows only.