As a follow-up: I am nearing completion of a GPL package to provide secure file trading via web interface. It will offer temporary, expiring "visitor" accounts for outsiders' use, and will handle file clean-up on expiration, etc.

This was just a sideline project, but based on the interest shown here, I now intend to finish it as quickly as I can.

/msg me or send email if you're interested...

Russ