Is it possible to somehow limit the access to an Amazon S3 account. I don't really like the idea of distributing my secret access key to all of my applications, that want to access just a single bucket on my account. If someone gains access to one of the applications, I could loose all my data stored on S3.

One way I was thinking to do it would be creating a second S3 account and give it access to just one bucket of the main account, but it's not really a great solution.

Another nice thing for me would be to give the secondary account only write (but not modify/delete) and read access. That way I could upload backups or other files and be sure, that they won't get lost.