Upload file??

Is there any way to have a button on a flash web site that will allow you to select a file to upload to a cgi script?

No. The Flash Player was specifically designed so that it cannot see local files and directories (for security reasons).

what about a java app inside the movie that could upload??

I don't know if you can run java INSIDE an swf. Your best bet is probably to just not use flash for file upload. It's possible with asp.