I just got a billing statement for my usage of the Amazon S3 storage service and it's amazing! Well not the actual statement but the contents of the statement. The statement shows that I have 5.36 USD due.I uploaded around 3,5 GB of data to my account but what I'm paying for is not the storage costs but the transfer costs. Bandwidth is more expensive than storage! Of the amount due is 0.54 USD for storage and 1.08 USD is tax. The rest is transfer and bandwidth.
For those interested I'm using Amazon S3 for backup of my laptop (and with the problems I have been having with my laptop disk lately I'm happy I'm backing up once a day). To make Amazon S3 look like a drive and to handle the actual (scheduled) backup I'm using Jungledisk which I can highly recommend.
Update: Just saw an article on developerWorks on Amazon S3.