Displaying a 'file uploading' message to user

I have an ASP.NET app that uploads files into a database. Some of the files are big. I wanted to know if there is any way to display a message to the user that the file is uploading?
Long-time problem. There's no way of avoiding this. Not even the cool new OWA or Hotmail interfaces do anything about it when you are attaching files. I guess everybody has just given up.

This was first published in January 2004