>The service would be handy. But I would zip the file with an encryption key before uploading to any third party service like these. Then seperately email the key to the recipient.
Right. It may be risky for confidential information.
I was thinking about another potential risk, namely, the harvesting of e-mail addresses.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)