I'm setting up an instance of WordPress 3.4 on Heroku and am looking for a plugin that will store media files on S3, given that you can't store to the filesystem on Heroku (well, you can, but files get wiped out when you redeploy). The Amazon S3 Uploads plugin seems to do precisely this, but it seems like it's only compatible with WordPress up to version 3.3.2. What are my options here? Would I have to downgrade to 3.3.2? Are there other plugins available that are compatible? I also found WP2Cloud but that one requires MySQL to have ClouSE installed, which I don't think is an option on Heroku.