"Mount" cloudfiles on a Linux server?

How about s3fs? Performance is going to be pretty bad, but I know it's used with satisfaction by many people.

The Rackspace version of s3fs mentioned above is 'cloudfuse' and can be found here:

http://github.com/redbo/cloudfuse/

In both cases the solution is similar - a FUSE based connection.

Judging from this discussion:

http://www.jungledisk.com and http://www.elasticdrive.com should do what you ask (never tried it).

S3QL provides a full featured UNIX filesystem for Amazon S3 buckets and even arbitrary SFTP servers.

They have a comparison page where they list the features compared to those of other filesystems for S3 like S3FS and S3Backer.

I've been using S3FS on an Ubuntu machine for a while but it doesn't support UNIX permissions. S3QL handles permissions and also offers encryption and compression. I highly recommend it.