Amazon just launched a new analysis tool for Amazon S3 called, S3Stat. This tool uses the log files generated by S3, analyzes them using
Webalizer, and generates a variety of reports. Take a look at the
sample reports to learn more. There's a one-month free trial and usage after that costs just $2 per month. Take a look at the
pricing plan to learn more. While you are on the site you may want to take a look at their list of
S3 resources as well.