You can upload most any files to your server, but there's little need to do so unless the intention is to share them with other people that way.
When you create the swf using the fla file, the actionscript is compiled into the swf. The swf does not need the fla nor the .as files after that.
These forums are fallings apart. I answered this but it disappeared... will probably show up again now that I am reposting...
