It would be cool if the asset manager was integrated with remote S3 compatible buckets.
I can think of two ways:
a) Full integration meaning you can connect to an S3 bucket, browse and select media to add to pages.
b) Local file storage and remote upload to S3. You use the asset manager as usual using your local file storage but you add an option to upload to S3 directly.
Additionally for both methods you should be able to configure how media URLs are inserted into the pages as you will probably want to add ENV variables in the route to differentiate dev/qa/prod. Also the permissions for the files should be handled.
Anyway, you get the idea.
Currently I use Cyberduck to connect remotely but It would be great to be able to pick a file either locally or remotely and add the correct URL respecting ENV variables.