using automator/applescript to upload files to a web form?
I followed @drevickos very good instructions. Didn't manage it with Safari, but Firefox works perfectly. 
Below the downloads for the Service file UploadFilesWebForm and the Automator file UploadFirefox3.

With these files, I managed to upload multiple files to SAS on AWS. 
For any other website, you should adjust:


Watch me do procedure to fit your web form in the UploadFirefox3 file
The delay needed for upload specified in the UploadFirefox3 file


UploadFilesWebForm.workflow.zip
http://www45.zippyshare.com/v/QQm0SKJ5/file.html
UploadFirefox3.workflow.zip
http://www45.zippyshare.com/v/bHyKGi2g/file.html