This sounds like a cool idea! I'm down with it!!

As for the FTP...

You can setup some ftp server software to be able to have users access the ftp from Internet Exploerer or any web brower. I use Bullet Proof FTP Server and it allows this function. So no ftp client software would have to be used. You just use the copy and paste function to upload to the ftp, and click the file to download from it. To see an example of what i mean just click this link ftp://frequencies.ath.cx it brings up a login screen right inside your browser!!