[Dovecot] Using Amazon S3 storage for Maildir ?

[Forrest Aldrich]

I wonder if anyone has tried using an IMAP server with Amazon S3 as a 
backend.   There would be many factors to consider (speed, etc).   
However, moreso, I don't know that Maildir(++) would support multiple 
folders that might be linked into the cloud.  For example, higher-I/O 
local incoming mail is on disk, some folders archived on S3.   Could be 
easily done by simply creating another account and storing its Maildir 
in S3 --

Curious....