title: File sync application like dropbox for Amazon S3
body: <p>I'm struggling with a bit problem. I have the past days been thinking about how nice it would be with a dropbox kind of app that could keep a folder synched with my amazon s3 back end. Sadly, not really tried alot out, but from reading i havent been able to find any apps that features exactly what dropbox do. </p>
  
  <p>I dont wanna mount a network drive and such.</p>
  
  <p>I'm quite sure that i would be able to write a little app myself that could upload and download files from amazon s3 bucket, but thinking about it lead me to a dilemma. </p>
  
  <p>From my understanding dropbox does like svn do, it only commit its changes. So are anyone able to give some input on the stuff behind the scene?</p>
  
  <p>If i change a file on my system, how can it check the changes vs this file and the one on the remote site without first downloading the remote file?</p>
  
  <p>If anyone know of a client that works great and like dropbox, feel free to share aswell. I found that ubuntu one have a great system working with cheaper prices then dropbox.</p>