You can, read more here: http://docs.amazonwebservices.com/AmazonS3/2006-03-01/UsingHTTPPOST.html For a progress bar, you will need Flash on the browser (or something similar) or upload to your server.
Andrew Timberlake http://ramblingsonrails.com http://www.linkedin.com/in/andrewtimberlake
"I have never let my schooling interfere with my education" - Mark Twain