(My apologies ahead of time if this is the wrong forum.)
I posted a while ago on some of Amazon's forums looking for
Flex (Actionscript really) libraries for interacting with Amazon's
S3 service, but unfortunately received no responses. Fortunately
for someone else, however, supply and demand has kicked in and my
company has now posted a job for a Flex based S3 Browser on Elance.
If you're interested, take a look: