Ubercart

This is something I could code fairly easily, as it may be something I'll need in the next 6-8 months. But if you need it done sooner, you might want to post in the bounties thread.

It is quite a bit different than the File Product module (as it stands now). But it could come in handy for gift file downloads.

YA, as the file product requires a user to be logged in it wold require some extra work. I guess you could have some sort of key system which makes one-time-only links to downlad something.

Then you would need an interface to add the user again when something goes wrong (and it always does).