I just found this post on the Dropbox developer blog regarding the new Dropbox Sync API for mobile apps. Finally! Automatic syncing from apps with Dropbox support! If this started to catch onto apps like BeatMaker 2 or Meteor Multitrack Recorder, I would probably never need or use iCloud (see previous post).
If for some weird reason you aren’t already using Dropbox, sign up via this referral link and we’ll both score an extra 500 MB!